NCIS: Los Angeles (2009)

S8E7 Crazy Train

When an NSA analyst is discovered to have been devoured by a shark, the team dives into an investigation that uncovers a cartel’s money-laundering operation. This leads Callen to go undercover in a mental institution to track down a crucial witness. Meanwhile, Kensi faces her own challenges as she grapples with the difficulties of her therapy sessions.