In 1974 , Roddy McDowall appeared in CBS 's Planet of the Apes television series , following his role on the Planet of the Apes ( 1968 film ) .
In particular , Roddy McDowall had a long-running relationship with the Apes series , appearing in four of the original five films ( absent , apart from a brief voiceover , from the second film of the series , Beneath the Planet of the Apes , due to a scheduling conflict for which he was replaced by David Watson in the role of Cornelius ) , and also in the 1974 CBS television series .
Planet of the Apes -LRB-1968 film-RRB-