The son of quadruple-threat master of comedy Carl Reiner, Rob Reiner grew up in the same Bronx neighborhood as his future wife Penny Marshall and followed a path much like his father's en route to his own success, performing stand-up comedy and writing for TV shows like "Romp" (ABC, 1968) and "The Summer Smothers Brother Show" (CBS, 1968). After appearing in two films directed by his father ("Enter Laughing" 1967; "Where's Poppa?" 1970), the prematurely balding, heavy-set actor made his TV debut as a "motorcycle hood" on "The Partridge Family" (ABC) in 1970. Fame came knocking the following