In Reverse Parthenogenesis Amber Benson and Adam Busch play a married couple. However they have both already acted alongside each other in Buffy The Vampire Slayer. Adam Busch who plays Warren Meers in BTVS actually killed Amber Bensons character Tara Maclay, leading to her exit from the series. Later on Willow, played by Alyson Hannigan; Tara's lesbian witch girlfriend skins Warren alive, in revenge for the stray bullet that killed Tara.