In part 1 of the season finale, the agents prepare to take down the Solano cartel. 

Mike's hot-headedness played right into Sid's sinister plan, which is yet to be fully revealed, but clearly finds Briggs in danger, while Paige continues to have her suspicions about Mike and his involvement in Lena's disappearance fueled.

Charlie's dealings with Amber could be her last.

Lucia's eagerness to get out from under the iron thumb of her father may put Johnny's operation in danger.