Critics and fans highlight "Believer" as a standout finale for its tension and the way it masterfully sets up the show's 300th episode. Reviewers on IMDb note its effectiveness as a "sterling example" of a suspenseful mid-story cliffhanger.
The BAU discovers a "mole" within their own ranks—an FBI agent who is actually a member of the cult.
The investigation leads to the capture of the cult leader, Benjamin David Merva, also known as "The Messiah".
" Believer " is the (Episode 22) of the police procedural drama Criminal Minds , which originally aired on April 18, 2018. It serves as the first half of a major cliffhanger that concludes in the landmark 300th episode. Episode Summary