Wiseguy - Season 1 Episode 20 -

Susan is arrested for Mel's murder and while she's in jail, she tells Vinnie she's pregnant with their baby. Roger sets Vinnie up for Mel's murder, then sets about driving Susan mad so he can gain control of her vast fortune to fund the Isle Pavot coup. Frank trails Roger to Herb. Vinnie finds out Susan isn't pregnant. Susan goes insane and has to be institutionalized.