<P> Joe Hardy was engaged in the first episode, but his fiancee was killed in a hit - and - run, investigated by the FBI . After solving the case, Frank and Joe become government agents at the Justice Department . Their boss, Harry Hammond, became a regular cast member . </P> <P> Midway through the season, the series was canceled by ABC . </P> <Table> <Tr> <Th> Actor </Th> <Th> Character </Th> <Th_colspan="3"> Season </Th> </Tr> <Tr> <Th> Season 1 (1977) </Th> <Th> Season 2 (1977 - 78) </Th> <Th> Season 3 (1978 - 79) </Th> </Tr> <Tr> <Td> Parker Stevenson </Td> <Td> Frank Hardy </Td> <Td_colspan="3"> Starring </Td> </Tr> <Tr> <Td> Shaun Cassidy </Td> <Td> Joe Hardy </Td> <Td_colspan="3"> Starring </Td> </Tr> <Tr> <Td> Pamela Sue Martin </Td> <Td> Nancy Drew </Td> <Td_colspan="2"> Starring </Td> <Td_colspan="1"> N / A </Td> </Tr> <Tr> <Td> Janet Louise Johnson </Td> <Td_colspan="1"> N / A </Td> <Td_colspan="1"> Recurring </Td> <Td_colspan="1"> N / A </Td> </Tr> <Tr> <Td> Ed Gilbert </Td> <Td> Fenton Hardy </Td> <Td_colspan="3"> Regular </Td> </Tr> <Tr> <Td> William Schallert </Td> <Td> Carson Drew </Td> <Td_colspan="2"> Regular </Td> <Td_colspan="1"> N / A </Td> </Tr> <Tr> <Td> Jean Rasey </Td> <Td> George Fayne </Td> <Td_colspan="1"> Regular </Td> <Td_colspan="2"> N / A </Td> </Tr> <Tr> <Td> Susan Buckner </Td> <Td_colspan="1"> N / A </Td> <Td_colspan="1"> Recurring </Td> <Td_colspan="1"> N / A </Td> </Tr> <Tr> <Td> George O'Hanlon Jr . </Td> <Td> Ned Nickerson </Td> <Td_colspan="1"> Regular </Td> <Td_colspan="2"> N / A </Td> </Tr> <Tr> <Td> Edith Atwater </Td> <Td> Gertrude Hardy </Td> <Td_colspan="1"> Regular </Td> <Td_colspan="2"> N / A </Td> </Tr> <Tr> <Td> Lisa Eilbacher </Td> <Td> Callie Shaw </Td> <Td_colspan="1"> Regular </Td> <Td_colspan="2"> N / A </Td> </Tr> <Tr> <Td> Jack Kelly </Td> <Td> Harry Hammond </Td> <Td_colspan="2"> N / A </Td> <Td_colspan="1"> Regular </Td> </Tr> <Tr> <Td> Robert Karnes </Td> <Td> Sheriff King </Td> <Td_colspan="1"> Recurring </Td> <Td_colspan="2"> N / A </Td> </Tr> <Tr> <Td> Herb Voland </Td> <Td> Chief Ezra Collig </Td> <Td_colspan="1"> Recurring </Td> <Td_colspan="2"> N / A </Td> </Tr> <Tr> <Td> Gary Springer </Td> <Td> Chet Morton </Td> <Td_colspan="1"> Recurring </Td> <Td_colspan="2"> N / A </Td> </Tr> <Tr> <Td> Ruth Cox </Td> <Td> Bess Marvin </Td> <Td_colspan="1"> N / A </Td> <Td_colspan="1"> Recurring </Td> <Td_colspan="1"> N / A </Td> </Tr> </Table> <Tr> <Th> Actor </Th> <Th> Character </Th> <Th_colspan="3"> Season </Th> </Tr>

Who played nancy drew in the tv series