Gangland Undercover (2015)

S3E20 The Black Widower

The boys grow increasingly uneasy when they set up their lonely Grandma with Fred, a charming regular at the diner. Their concerns escalate when they suspect that Fred might actually be a notorious killer dubbed "The Black Widower." As they dig deeper, they grapple with the terrifying possibility that they have unwittingly played matchmaker to a dangerous criminal, leading to a frantic race against time to protect Grandma from a potentially deadly romance.