Just saw someone say what if Buddy is the cell but most people think Bose's birth is the cell. NOW HEAR ME OUT.
For the whole first half of the season Bose has been talking about how his birth dad is no longer in his life, which he's never done in pervious season which leads us to believe this could mean something for the plot.
Then we meet Buddy as Lil Dynamite, who has a past vendetta against Captain Man and Danger Force. All of the sudden become like 5th member, which, if you ask me, feels kind of unneeded if it wasn't for his mom, unless there was good a reason they decided to bring him back for the whole season. Now we know that Buddy's father isn't in his life or we can assume so because when Buddy tries to tell Ray the situation, he gets shut down, so we don't really know.
Now hear me out, this is where I might lose you...Buddy and Bose are related(half brothers).
The reason for lil dynamite being brought back and gaining such a close relationship with the team is actually a part of something bigger.
Now I don't think Buddy is the cell, but I do think he couldn't be working for them and knows who #1 is(Bose's birth dad, his dad too ig), because if we really think about it. Why did he just disappear after the cell came? Lil dynamite is all about helping, but this one time, when they could have really used him, he just vanished.