<P> Producers planned to continue Adventures of Superman in 1959 with two more years' worth of episodes, to begin airing in the 1960 season . The death of actor John Hamilton threw the plan into disarray . Actor Pierre Watkin was hired to replace Hamilton as "Perry White's brother" (Watkin had played Perry White himself in the two Columbia serials, and had guested on the series before). </P> <P> The sudden death of the show's star George Reeves in June 1959 was not the end of the series either, in the producers' eyes . When Jack Larson returned from Europe after the death of Reeves, producers suggested the series could continue as "Superman's Pal, Jimmy Olsen," with more focus on Larson continuing his character, playing opposite a "Superman" who would be a composite of stock shots of George Reeves and a look - alike stunt double to be filmed from behind . Larson rejected the distasteful idea out of hand, and the series was truly over . </P> <P> Another spin - off idea was a pilot produced by Whitney Ellsworth in 1961: The Adventures of Superboy . Johnny Rockwell starred as a young Clark Kent in Smallville, and as Superboy wore a suit similar in design to George Reeves' suit . Although thirteen scripts had been written, only the pilot was filmed . </P> <P> Neill and her original 1948 Superman serial co-star, Kirk Alyn, enjoyed cameos in the 1978 film Superman as Lois Lane's parents . Their dialog scene was cut for theatrical release, but played in its entirety when the film was broadcast on TV, and later in the 2000 director's cut restoration . Neill and Jack Larson both made guest appearance on the TV series Superboy in the episode "Paranoia" during the show's fourth season . </P>

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