S2, E8: Riggs and Murtaugh are led into the underground mob world as they investigate a murder in a hospital. Meanwhile, Murtaugh learns that his daughter Riana is secretly dating the son of his neighbor and nemesis (guest star ANDREW PATRICK RALSTON). Also, Riggs spends more time with his childhood friend, Molly (recurring guest star KRISTEN GUTOSKIE); and Scorsese’s real name is revealed.