Special Agent Sam Walker is a fictional character portrayed by Benito Martinez in the TV series Castle.
In the first episode they appeared in, titled The Wild Rover (season 5), they were 41 years old.
They appear in 1 episodes out of a total of 173 aired
Episodes1
The Wild Rover
episode S5.E18 march 2013The corpse of Jimmy, a baker popular for cup cakes, is found in his industrial dough mixer. His apprentice, Todd, noticed someone in a vintage muscle car, before being sent away. The car was identified as belonging to Irish mob boss Robert 'Bobby S.' Shannon. After FBI agent Sam Walker tells the team that Jimmy was his informant, Ryan astounds everyone by revealing he had been undercover in that gang years ago. And, to save a friend, chooses to revive his alias, Fenton, and go back undercover.
