<P> In season two, San Francisco police academy graduate Kris Munroe takes the place of her older sister, Jill, in the trio; in the fourth season, Tiffany Welles, a Boston police academy graduate, takes Sabrina's place; and in the fifth and final season, model - turned - private investigator in training Julie Rogers fills the void left after Tiffany's departure when she is given a temporary private detective license . </P> <P> Charlie's Angels was generally formatted in the way of a procedural drama much like the vast majority of other crime shows of the era . Many of the episodes follow a regular structure whereby a crime is committed, the' Angels' are given the case details, and then they go undercover to solve the crime . Inevitably, the final scene takes place back at the Townsend office with Charlie offering his congratulations for a job well done . Most episodes have stand - alone plots and are usually not referenced in future episodes . </P> <Table> <Tr> <Th> Actor </Th> <Th> Character </Th> <Th_colspan="5"> Seasons </Th> <Th> Years </Th> </Tr> <Tr> <Th> </Th> <Th> </Th> <Th> </Th> <Th> </Th> <Th> 5 </Th> </Tr> <Tr> <Td> Kate Jackson </Td> <Td> Sabrina Duncan </Td> <Td_colspan="3"> Main </Td> <Td_colspan="2"> </Td> <Td> 1976--1979 </Td> </Tr> <Tr> <Td> Farrah Fawcett </Td> <Td> Jill Munroe </Td> <Td> Main </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> Guest </Td> <Td_colspan="1"> </Td> <Td> 1976--1977 </Td> </Tr> <Tr> <Td> Jaclyn Smith </Td> <Td> Kelly Garrett </Td> <Td_colspan="5"> Main </Td> <Td> 1976--1981 </Td> </Tr> <Tr> <Td> Cheryl Ladd </Td> <Td> Kris Munroe </Td> <Td_colspan="1"> </Td> <Td_colspan="4"> Main </Td> <Td> 1977--1981 </Td> </Tr> <Tr> <Td> Shelley Hack </Td> <Td> Tiffany Welles </Td> <Td_colspan="3"> </Td> <Td> Main </Td> <Td_colspan="1"> </Td> <Td> 1979--1980 </Td> </Tr> <Tr> <Td> Tanya Roberts </Td> <Td> Julie Rogers </Td> <Td_colspan="4"> </Td> <Td> Main </Td> <Td> 1980--1981 </Td> </Tr> <Tr> <Td> David Doyle </Td> <Td> John Bosley </Td> <Td_colspan="5"> Main </Td> <Td> 1976--1981 </Td> </Tr> <Tr> <Td> John Forsythe (voice) </Td> <Td> Charles "Charlie" Townsend </Td> <Td_colspan="5"> Main </Td> <Td> 1976--1981 </Td> </Tr> </Table> <Tr> <Th> Actor </Th> <Th> Character </Th> <Th_colspan="5"> Seasons </Th> <Th> Years </Th> </Tr>

Who played charlie's voice on charlie's angels