Risk (S04E09)

Ben finds himself heading down a slippery slope as he attempts to help the daughter of a prostitute -- putting him in hot water with the woman's pimp. Lydia and Ruben investigate the murder of a gang-banger who may have been killed over a graffiti tag. Tang faces more questions about her shooting of an innocent bystander, which could ultimately determine whether she gets promoted to sergeant. (Warner Bros. UK)