3x18 brings us the day of Larry James' remarriage to his wife, Kelly. With Cordell officiating, DJ as his best man, and the Walker ranch hosting, very little can go wrong. Cordell is determined to make this the best possible wedding for his friend and the whole family is pitching in. Liam and the rest of the famolu work on making an old barn into a beautiful venue, with the help of a few friends, and Cordell works on hammering out the finer details with Geri. But there's trouble afoot as an old colleague, detective David Luna out of Corpus Christi (played by guest star Justin Cortez) calls him with news relating to an old serial killer cold case. Cordell is also thrown for a loop when August tells him he plans to enlist in the military and asks for permission to go to basic training camp before his senior year. Thankfully, the wedding ceremony and reception go off without a hitch, including a surprise musical performance, and Cordell can mostly set those worries aside and just enjoy the time with his family. But there's trouble brewing as a mysterious figure has broken into Geri's house and made a mess of the place, only to run into Stella and Sadie. When the girls believe the intruder is dead, Stella goes running to Liam for help, only for the body to disappear later. In the meantime, Cordell gets confirmation that an old foe, the Jackal, is back in business right after he rekindles his romance with Geri. With a cliffhanger like this, season 4 has a lot of loose ends to tie up!