<Table> <Tr> <Th_colspan="2"> "What Is...Cliff Clavin?" </Th> </Tr> <Tr> <Td_colspan="2"> Cheers episode </Td> </Tr> <Tr> <Td_colspan="2"> Cliff Clavin bets all $22,000 winnings and loses all in the final round of Jeopardy! </Td> </Tr> <Tr> <Th> Episode no . </Th> <Td> Season 8 Episode 14 </Td> </Tr> <Tr> <Th> Directed by </Th> <Td> Andy Ackerman </Td> </Tr> <Tr> <Th> Written by </Th> <Td> Dan O'Shannon Tom Anderson </Td> </Tr> <Tr> <Th> Production code </Th> <Td> 182 </Td> </Tr> <Tr> <Th> Original air date </Th> <Td> January 18, 1990 (U.S.) </Td> </Tr> <Tr> <Th_colspan="2"> Guest appearance (s) </Th> </Tr> <Tr> <Td_colspan="2"> <Ul> <Li> Alex Trebek as himself </Li> <Li> Johnny Gilbert as himself </Li> <Li> Greg E. Davis as Timmy </Li> </Ul> </Td> </Tr> <Tr> <Th_colspan="2"> Episode chronology </Th> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Td> ← Previous "Sammy and the Professor" </Td> <Td> Next → "Finally! Part 1" </Td> </Tr> </Table> </Td> </Tr> <Tr> <Td_colspan="2"> Cheers (season 8) List of Cheers episodes </Td> </Tr> </Table> <Tr> <Th_colspan="2"> "What Is...Cliff Clavin?" </Th> </Tr> <Tr> <Td_colspan="2"> Cheers episode </Td> </Tr>

Who are three guys who have never been in my kitchen