Naked City (1958)

Season 4: Episode 8

To remain straight, an ex-con informs on the would-be robbers of a bar where he works, instead of helping the stickup men, his former pals. But the hoods' connection to Link Toland, a seemingly respectable businessman with serious political juice, cranks the heat way up on the young informant, his family, the investigating detectives, and even the tavern owner.