Wiseguy (1987) : 3x7

Vinnie and Frank try to cheer up Dan, who's depressed about becoming a grandfather. When Lauren finds a phony check in her husband's pocket, she asks Dan to investigate, and he uncovers a scam a local builder is using to bilk his insurance company. The builder is shut down, throwing Stephen out of a job and making him decide to leave town. (source: http://www.plasticcow.com/wiseguy)