No 1960s episodes exist on their original videotapes (all surviving prints being film transfers), though some were transferred to film for editing before transmission, and exist in their broadcast form.
Ingen 1960'er episoder eksisterer i deres originale videobånd (alle overlevende print værende film overførsler), selvom nogle blev overført til film til redigéring før transmission, og eksisterer i deres udsendings-form.