<Tr> <Td_colspan="6"> Charlie moonlights as a character in late night commercials for an appliance store . </Td> </Tr> <Tr> <Th> 64 </Th> <Td> 20 </Td> <Td> "King of Remedial" </Td> <Td> Art Dielhenn </Td> <Td> Ray Jessel & Cynthia Thompson </Td> <Td> April 26, 1989 (1989 - 04 - 26) </Td> </Tr> <Tr> <Td_colspan="6"> Fed up with Dennis' constant gags, Charlie shows him the door - to a remedial history class, where Dennis becomes the inspirational leader for an academic meet against the IHP kids . </Td> </Tr> <Tr> <Th> 65 </Th> <Td> 21 </Td> <Td> "Labor Daze" </Td> <Td> Art Dielhenn </Td> <Td> Jerry Rannow </Td> <Td> May 3, 1989 (1989 - 05 - 03) </Td> </Tr>

Head of the class season 5 episode 22