<Tr> <Th> 99 </Th> <Td> 23 </Td> <Td> "Hyde's Birthday" </Td> <Td> David Trainer </Td> <Td> Mark Hudis </Td> <Td> April 23, 2002 (2002 - 04 - 23) </Td> <Td> 419 </Td> </Tr> <Tr> <Td_colspan="7"> Kitty wants to throw a surprise party for Hyde's 18th birthday, but he refuses to attend . While Jackie and Fez bicker over how to decorate for the party, Eric, Donna and Kelso go out to find the perfect gift for Hyde . </Td> </Tr> <Tr> <Th> 100 </Th> <Td> 24 </Td> <Td> "That' 70s Musical" </Td> <Td> David Trainer </Td> <Td> Rob des Hotel & Dean Batali </Td> <Td> April 30, 2002 (2002 - 04 - 30) </Td> <Td> 421 </Td> </Tr> <Tr> <Td_colspan="7"> A musical episode: Fez stars in the school musical pageant, but worries his friends will not attend to watch . His daydreams and fantasies throughout the episode include music from The Turtles, the Steve Miller Band, Nazareth, The Carpenters, and Peaches & Herb . </Td> </Tr>

When do eric and donna get back together in season 4