<Tr> <Td_colspan="8"> When Buffy and Riley rouse a supernatural force at the fraternity party house, they are held hostage by ghost children who were abused by a Christian fundamentalist (Kathryn Joosten) and now seek revenge . Willow, Tara, and Giles perform a spell to stop the spirits . </Td> </Tr> <Tr> <Th> 75 </Th> <Td> 19 </Td> <Td> "New Moon Rising" </Td> <Td> James A. Contner </Td> <Td> Marti Noxon </Td> <Td> May 2, 2000 (2000 - 05 - 02) </Td> <Td> 4ABB19 </Td> <Td> N / A </Td> </Tr> <Tr> <Td_colspan="8"> Oz returns to Sunnydale after learning to control his werewolf instincts . However, he loses control when he suspects Tara (Amber Benson) and Willow's relationship, and is subsequently caught by the Initiative . </Td> </Tr> <Tr> <Th> 76 </Th> <Td> 20 </Td> <Td> "The Yoko Factor" </Td> <Td> David Grossman </Td> <Td> Douglas Petrie </Td> <Td> May 9, 2000 (2000 - 05 - 09) </Td> <Td> 4ABB20 </Td> <Td> N / A </Td> </Tr>

Buffy the vampire slayer season 4 episode 1 cast