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1965: William Hartnell (1908 - 1975), the first incarnation of TV's Dr Who, feels the hairless pates of two ticklish co-stars. They are appearing as the Teknix, bald mutated humans employed in Space Security. (Photo by Express/Express/Getty Images)

1965:  William Hartnell (1908 - 1975), the first incarnation of TV's Dr Who, feels the hairless pates of two ticklish co-stars. They are appearing as the Teknix, bald mutated humans employed in Space Security.  (Photo by Express/Express/Getty Images)