Wiseguy
One on One (1x6)
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After several deals go sour, Sonny starts suspecting Vinnie may be a plant. Frank orders Vinnie to drop the case when he finds out the local police have an informer in Sonny's operations. Sid has Frank picked up and tortured, but Vinnie and undercover cop Karen Malloy rescue him. Karen's disappearance points the finger at Sid as the leak.