[s19e15] Thick As Thieves -

The investigation uncovers a link to Alden Parker's delinquent past. Parker's former childhood friend, Billy Doyle, is connected to the suspect, triggering a trip down memory lane for the new team leader.

It is revealed that a young Parker used to steal hubcaps with Billy before a specific incident "scared him straight" into a law enforcement career. [S19E15] Thick as Thieves

Focuses on Parker building trust with his new team (McGee, Torres, Knight) by being vulnerable about his past. Alden Parker: Gary Cole Timothy McGee: Sean Murray Nick Torres: Wilmer Valderrama Jessica Knight: Katrina Law Jimmy Palmer: Brian Dietzen Kasie Hines: Diona Reasonover Leon Vance: Rocky Carroll Billy Doyle: Guest Star The investigation uncovers a link to Alden Parker's