Character mistake: When Nick and Hank talk about going through the park, Hank says "come on, David." David is Nick's real name.
Tarantella - S1-E11
Character mistake: Hank's action as a cop towards the man on the boat makes no sense when going after Lena. He has to think the man he grabs is a potential victim. Obviously, he wants to keep him quiet, but there's no reason for Hank to hold his gun against an innocent man with his finger on (or near) the trigger.
Character mistake: Raymond refers to his equipment as EMF (Electromagnetic Fields), except it is labelled as EMR (Electromagnetic Radiation).