Criminal Minds 4.14 Cold Comfort guest stars Mercedes McNab and it is an episode which had Nicholas Brendon in a recurring role and both are Buffy alums but there was no on-screen reunion between them here.
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.