Saw the penultimate story of Touched by an Angel, Last Dance which guest starred Mercedes McNab. This episode came on May 10 1998 and of course Mercedes would later be a regular in the unrelated Angel.
In front of Matthew See, Karen Gillan takes off Billie Piper's bikini, Karen then takes off Jenna Coleman's bikini, Billie and Jenna then takes off Karen's bikini. All are now showing their tits to Matthew as he kisses all three of them and sucks their tits.