<Tr> <Td> CBS </Td> <Td> July 1952 </Td> <Td> May 1952 </Td> </Tr> <Tr> <Td> CBS </Td> <Td> July 1952 </Td> <Td> August 1953 </Td> </Tr> <Tr> <Td> DuMont </Td> <Td> October 1953 </Td> <Td> April 1954 </Td> </Tr> <Tr> <Td> CBS </Td> <Td> June 1954 </Td> <Td> August 1954 </Td> </Tr>

Name two dramas that during primetime had 20-year runs on broadcast network television