Revealing mistake: When Morgan is typing "Cult named Forever People," his phone is typing it automatically. His fingers aren't even tapping the correct letters. (00:19:45)
Character mistake: When Blake is telling Spencer to keep his eyes on her after being shot she calls him Ethan twice. (00:02:29)
Suggested correction: This is very poignant and deliberate moments in the dialogue. Blake is feeling distraught since Reid pushed Blake out of the way and took the bullet instead of her. Blake calls Reid by her dead son's name, "Ethan," when she tries to keep him alert and shouts, "Ethan, Ethan!" Later in the episode, when Blake takes Reid back to his apartment, she explains that watching Reid when he was hurt touched a nerve. Reid then asks Blake, "Who's Ethan?" and Blake tells Reid all about her son "Ethan" who died when he was 9 years old. Blake then tells Reid that "Ethan" would have been a lot like him. Note, on the jet return flight, Blake texted Hotch her resignation from the BAU, and at the very end she leaves her badge with Reid.
Character mistake: Dr. Reid calls Penelope "Kristy" on a phone call.
Suggested correction: He calls her "Garcia."
About Face - S3-E6
Continuity mistake: This episode is a flash back to when Agent Gideon joins the team, but agent Prentiss is already a member. She didn't join until season 2 (when agent Gideon was already an established character).