Digger Harkness (Captain Boomerang I) chronology
Suicide Squad Vol. 1 #44 (August 1990): "Grave Matters" [Flashback - childhood and young adulthood]
Flash Vol. 3 #7 (late January 2011): "What Goes Around, Comes Around" [Flashback - childhood and young adulthood]
Flash Vol. 1 #117 (December 1960): "Here Comes Captain Boomerang" [Flashback – he answers an ad to become the Wiggins spokesman]
Flash Vol. 1 #117 (December 1960): "Here Comes Captain Boomerang"
Flash Vol. 1 #124 (November 1961): "Space-Boomerang Trap"
Flash Vol. 1 #148 (November 1964): "The Day Flash Went into Orbit"
Flash Vol. 1 #155 (September 1965): "The Gauntlet of Super-Villains"
Legends of the DC Universe #16 (May 1999): "Dark Matters Part Two"
Legends of the DC Universe #17 (June 1999): "Dark Matters Part Three"
Flash Vol. 1 #174 (November 1967): "Stupendous Triumph of the Six Super-Villains"
Justice League of America Vol.1 #61 (March 1968): "Operation: Jail the Justice League"
Secret Origins Vol. 2 Annual #2 (1988): "Mystery of the Human Thunderbolt Part 2"
Flash Vol. 2 #190 (November 2002): "Rat Race" [Flashback - Hartley attempting to open up to the Rogues]
Flash Vol. 2 #218 (March 2005): "Rogue Profile: Heat Wave" [Flashback - Len and Mick squabble while the Rogues socialize]
Flash Vol. 1 #209 (September 1971): "Beyond the Speed of Life"
Flash Vol. 1 #227 (May-June 1974): "Flash-This Is Your Death"
Flash Vol. 1 #242 (June 1976): "The Charge of the Electric Gang"
Flash Vol. 1 #243 (August 1976): "If I Can't Rob Central City, Nobody Can"
Flash Vol. 1 #244 (September 1976): "The Last Day of June Is the Last Day of Central City"
Secret Society of Super-Villains #1 (May-June 1976): "Attend Or Die"
Secret Society of Super-Villains #3 (September-October 1976): "War for Earthdeath"
Secret Society of Super-Villains #4 (November-December 1976): "When Thieves Fall Out"
Secret Society of Super-Villains #5 (January-February 1977): "Endgame"
Secret Society of Super-Villains #6 (March-April 1977): [No Title]
Batman Vol. 1 #322 (April 1980): "Chaos--Coming and Going"
Flash Vol. 1 #275 (July 1979): "The Last Dance"
Flash Vol. 1 #283 (March 1980): "Flashback" [Flashback - the night of Iris' murder]
Flash Vol. 1 #278 (October 1979): "Road to Oblivion"
Flash Vol. 2 #215 (December 2004): "The Secret of Barry Allen Part 2" [Flashback - Roscoe brainwashed by Zatanna and brainwashes the Rogues]
Flash Vol. 1 #310 (June 1982): "Colonel Computron Strikes Back With a Vengeance"
Flash Vol. 1 #311 (July 1982): "Captives of the Boom-Boom-Boomerang"
Flash Vol. 1 #325 (September 1983): "Dead Reckoning"
Flash Vol. 1 #337 (September 1984): "Beware the Speed-Demons" [behind the scenes - sends a message to Piper]
Flash Vol. 1 #338 (October 1984): "The Revenge of the Rogues"
Flash Vol. 1 #339 (November 1984): "Warday!"
Flash Vol. 1 #340 (December 1984): "Reach Out and Waste Someone!"
Flash Vol. 1 #341 (January 1985): "Trial and Tribulation"
Flash Vol. 1 #342 (February 1985): "Smash-Up"
Flash Vol. 1 #348 (August 1985): "The Final Verdict"
Flash Vol. 1 #349 (September 1985): "And the Truth Shall Set Him Free"
Flash Vol. 1 #350 (October 1985): "Flash Flees"
Batman Vol. 1 #388 (October 1985): "The Round-Trip Looking Glass"
Detective Comics #555 (October 1985): "Returning Reflections"
Expand
Crisis on Infinite Earths #5 (August 1985): "Worlds in Limbo"
Blue Devil #30 (November 1986): "Too Many Rogues"
Legends #3 (January 1987): "Send for... the Suicide Squad!"
Legends #4 (February 1987): "Cry' Havoc...!"
Legends #5 (March 1987): "Let Slip the Dogs of War"
Legends #6 (April 1987): "Finale!"
Suicide Squad Vol. 1 #1 (May 1987): "Trial by Blood"
Suicide Squad Vol. 1 #2 (June 1987): "Trial by Fire"
Suicide Squad Vol. 1 #3 (July 1987): "Jailbreak"
Suicide Squad Vol. 1 #4 (August 1987): "William Hell's Overture"
Fury of Firestorm Vol. 1 #64 (October 1987): "Through the Gauntlet"
Firestorm, the Nuclear Man Annual #5 (1987): "Ground Zero"
Suicide Squad Vol. 1 #5 (September 1987): "The Flight of the Firebird"
Suicide Squad Vol. 1 #7 (November 1987): "Thrown to the Wolves"
Suicide Squad Vol. 1 #8 (December 1987): "Personal Files" [commits crimes while dressed as Mirror Master]
Millennium #4 (January 1988): "Forth"
Suicide Squad Vol. 1 #9 (January 1988): "The Final Price"
Suicide Squad Vol. 1 #11 (March 1988): "Blood and Snow Part One" [also disguised as Mirror Master]
Suicide Squad Vol. 1 #12 (April 1988): "Blood and Snow Part Two"
Justice League International Vol. 1 #13 (May 1988): "Collision Course"
Suicide Squad Vol. 1 #13 (May 1988): "Battle Lines"
Suicide Squad Vol. 1 #14 (June 1988): "The Nightshade Odyssey, Part 1: Slipping into Darkness"
Suicide Squad Vol. 1 #15 (July 1988): "The Nightshade Odyssey, Part 2: Devil to Pay"
Suicide Squad Vol. 1 #16 (August 1988): "The Nightshade Odyssey, Part 3: Deathzone"
Suicide Squad Vol. 1 #17 (September 1988): "Battleground Manhattan"
Suicide Squad Vol. 1 #18 (October 1988): "Manhattan Massacre"
Suicide Squad Vol. 1 #19 (November 1988): "Personal Files - Amanda Waller" [behind the scenes - report of Mirror Master crimes]
Flash Vol. 2 #19 (December 1988): "A Meeting of Rogues"
Suicide Squad Vol. 1 Annual #1 (1988): "Ghosts and Shadows"
Suicide Squad Vol. 1 #20 (December 1988): "Practice to Deceive" [also disguised as Mirror Master]
Suicide Squad Vol. 1 #21 (winter 1988): "Rogues"
Suicide Squad Vol. 1 #22 (Holiday 1988): "Final Round"
Invasion! #2 (1988): "Battleground Earth"
Invasion! #3 (1989): "World Without Heroes"
Suicide Squad Vol. 1 #23 (January 1989): "Weird War Tales" [Flashback to the Invasion! war]
Suicide Squad Vol. 1 #23 (January 1989): "Weird War Tales"
Suicide Squad Vol. 1 #24 (February 1989): "Slings and Arrows"
Suicide Squad Vol. 1 #25 (March 1989): "Sea of Troubles"
Checkmate Vol. 1 #15 (early May 1989): "The Janus Directive, Part 1: Knight Kill"
Suicide Squad Vol. 1 #27 (early May 1989): "The Janus Directive Part 2: Scattermove"
Checkmate Vol. 1 #16 (late May 1989): "The Janus Directive, Part 3: Shadow Knights"
Suicide Squad Vol. 1 #29 (early June 1989): "The Janus Directive Part 8: Heavy Squad"
Checkmate Vol. 1 #18 (late June 1989): "The Janus Directive, Part 9: Knight Fight"
Suicide Squad Vol. 1 #30 (late June 1989): "The Janus Directive Part 10: Endgame"
Firestorm, the Nuclear Man Vol. 1 #87 (July 1989): "Freakstorm"
Suicide Squad Vol. 1 #31 (July 1989): "Acts Of Contrition"
Suicide Squad Vol. 1 #32 (August 1989): "Steel Trap"
Suicide Squad Vol. 1 #33 (September 1989): "Into the Angry Planet"
Suicide Squad Vol. 1 #34 (October 1989): "Armagetto"
Suicide Squad Vol. 1 #35 (November 1989): "That Hideous Strength"
Suicide Squad Vol. 1 #36 (December 1989): "In Final Battle"
Suicide Squad Vol. 1 #37 (January 1990): "Threads"
Suicide Squad Vol. 1 #41 (May 1990): "The Phoenix Gambit Part 2: Embers"
Suicide Squad Vol. 1 #42 (June 1990): "The Phoenix Gambit Part 3: Firefight"
Suicide Squad Vol. 1 #43 (July 1990): "The Phoenix Gambit Part 4: Black Queen's Mate"
Suicide Squad Vol. 1 #44 (August 1990): "Grave Matters"
Suicide Squad Vol. 1 #45 (September 1990): "The Jerusalem Serpent"
Suicide Squad Vol. 1 #46 (October 1990): "Choice of Evils"
Suicide Squad Vol. 1 #49 (January 1991): "Out of Control"
Suicide Squad Vol. 1 #50 (February 1991): "Debt of Honor"
Suicide Squad Vol. 1 #51 (March 1991): "Fractured Image"
Suicide Squad Vol. 1 #54 (June 1991): "The Dragon's Hoard, Part II: Divine Wind"
Suicide Squad Vol. 1 #55 (July 1991): "The Dragon's Hoard Part III: Dead Man's Hand"
Suicide Squad Vol. 1 #56 (August 1991): "The Dragon's Hoard Part IV: Dragon's Teeth"
Suicide Squad Vol. 1 #57 (September 1991): "The Dragon's Hoard Part V: Dragon's Blood"
Suicide Squad Vol. 1 #58 (October 1991): "Suicide Attack"
War of the Gods #3 (November 1991): "Casualties of War"
Wonder Woman Vol. 2 #61 (January 1992): "To Avenge an Amazon"
War of the Gods #4 (December 1991): "In the Beginning... There Was the End" [behind the scenes - is present at the big fight, but isn't shown]
Suicide Squad Vol. 1 #59 (November 1991): "Legerdemain, Part One: Forces in Motion"
Suicide Squad Vol. 1 #61 (January 1992): "Legerdemain, Part 3: Snafu"
Suicide Squad Vol. 1 #62 (February 1992): "Number the Dead"
Suicide Squad Vol. 1 #63 (March 1992): "True Minds"
Suicide Squad Vol. 1 #64 (April 1992): "Nasty As They Want To Be"
Suicide Squad Vol. 1 #65 (May 1992): "Run Through the Jungle"
Suicide Squad Vol. 1 #66 (June 1992): "And Be a Villain"
Flash Vol. 2 Annual #5 (1992): "Run-In!"
Showcase '94 #6/2 (early June 1994): "Allure of New Orleans"
Outsiders Vol. 2 #9 (July 1994): "Breakout"
Adventures of Superman #520 (February 1995): "Christmas Thieves"
Superboy Vol. 3 #13 (March 1995): "Watery Grave: Suicidal Tendencies"
Superboy Vol. 3 #14 (April 1995): "Watery Grave: Kill Them All"
Superboy Vol. 3 #15 (May 1995): "Watery Grave: Honor Among Thieves"
Underworld Unleashed #1 (November 1995): "Underworld Unleashed"
Flash Vol. 2 #120 (December 1996): "Presidential Race, Ch. 1: Circular Logic" [behind the scenes - the undead Rogues steal back their weapons]
Flash Vol. 2 #121 (January 1997): "Presidential Race, Ch. 2: Down To The Wire"
Flash Vol. 2 #123 (March 1997): "The Flash of Two Cities"
Flash Vol. 2 #125 (May 1997): "Cause and Effect"
Flash Vol. 2 #126 (June 1997): "Trial Run"
Flash Vol. 2 #127 (July 1997): "Hell to Pay, Part 1: Hell Breaks Loose"
Flash Vol. 2 #128 (August 1997): "Hell to Pay, Part 2: Heart and Souls"
Flash Vol. 2 #129 (September 1997): "Hell to Pay, Part 3: An Attack of Conscience"
Flash Vol. 2 #134 (February 1998): "Still Life in the Fast Lane"
New Year's Evil: The Rogues #1 (February 1998): "Men & Gods"
Flash Vol. 2 #138 (June 1998): "The Human Race, Part III: Home Run"
Flash Vol. 2 #140 (August 1998): "The Black Flash, Part II"
Flash 80-Page Giant #1/4 (August 1998): "The Professional"
Adventures of Superman #565 (March 1999): "The World Is My Backyard"
Robin Vol. 2 #62 (March 1999): "Faster Than Anything!"
Robin Vol. 2 #63 (April 1999): "The Blink of an Eye"
Robin Vol. 2 #64 (May 1999): "Stop Me If You've Heard This One"
Flash Secret Files & Origins #2 (November 1999): "Twenty-First Century Rogue"
Flash Vol. 2 #179 (December 2001): "Smile for the Camera"
Flash Vol. 2 #183 (April 2002): "Crossfire, Prologue: Tricked!"
Flash Vol. 2 #208 (May 2004): "Red Carpet" [behind the scenes - left messages with Trickster for a loan]
Flash Vol. 2 #213 (October 2004): "Slow Motion"
Identity Crisis #2 (September 2004): "House of Lies"
Identity Crisis #3 (October 2004): "Serial Killer"
Identity Crisis #4 (November 2004): "Who Benefits"
Flash Vol. 2 #215 (December 2004): "The Secret of Barry Allen, Part Two: Reformed"
Identity Crisis #5 (December 2004): "Father's Day"
Identity Crisis #6 (January 2005): "Husbands and Wives" [as a corpse; the Rogues are informed of his death]
Flash Vol. 2 #216 (January 2005): "The Secret of Barry Allen, Part Three: Spinning" [the Rogues are informed of his death; scene identical to Identity Crisis #6]
Flash Vol. 2 #217 (February 2005): "Post-Crisis" [as a corpse]
Flash Vol. 2 #220 (May 2005): "Rogue War Chapter 1" [as a corpse]
Flash Vol. 2 #221 (June 2005): "Rogue War Chapter 2" [as a corpse]
Flash Vol. 2 #222 (July 2005): "Rogue War Chapter 3" [as a corpse]
Flash Vol. 2 #223 (August 2005): "Rogue War Chapter 4" [as a corpse]
Flash Vol. 2 #225 (October 2005): "Rogue War Conclusion" [buried]
Blackest Night #8 (May 2010): "Blackest Night" [returns to life]
Brightest Day #0 (June 2010): "Carpe Diem"
Red Robin #15 (October 2010): "The Hit List, Part Three: Secret Identity Crisis"
Red Robin #16 (November 2010): "The Hit List, Part Four: The Best-Laid Plans"
Flash Vol. 3 #1 (June 2010): "Case One: The Dastardly Death of the Rogues"
Flash Vol. 3 #2 (July 2010): "Case One: The Dastardly Death of the Rogues"
Flash Vol. 3 #3 (August 2010): "Case One: The Dastardly Death of the Rogues, Part Three"
Flash Vol. 3 #4 (September 2010): "Case One: The Dastardly Death of the Rogues, Part Four"
Flash Vol. 3 #5 (November 2010): "Case One: The Dastardly Death of the Rogues, Part Four"
Flash Vol. 3 #6 (early January 2011): "Case One: The Dastardly Death of the Rogues, Part Six"
Brightest Day #7 (October 2010): "The Secret Of Life"
Flash Vol. 3 #7 (late January 2011): "What Goes Around, Comes Around"
Brightest Day #18 (late March 2011): "Easy Come Easy Go"
Brightest Day #23 (early June 2011): "Rise and Fall"
Brightest Day #24 (late June 2011): "Brightest Day"
Red Robin #26 (October 2011): "What Goes Around..."
It is uncertain where these stories fit into his chronology.
Batman #645 (November 2005): "Show Me Yesterday, For I Can't Find Today" [Flashback - during Jason Todd's stint as Robin]
Flash Vol. 2 #224 (September 2005): "Rogue War Chapter 5" [Flashback - Digger sent to the future and meets Meloni Thawne]
Secret Origins Vol. 2 #41 (June 1989): "A Rogue by Any Other Name"
Superman Secret Files and Origins 2004 (August 2004): "Suicide Watch"
DC Retro-Active: The Flash: 1980s (Oct 2011): "The Path Of True Love"
JLA 80-Page Giant #1 (1998): "The Secret Society of Super-Villains"
JLA 80-Page Giant #2 (1999): "With Friends Like These..."
DC Comics Presents: The Flash (October 2004): "The Fastest Man--Dead!"
Chronology also available at WordPress.