 It is not known whether this internal "oil-can'" head was original, but its rather rudimentary design and appearance is clearly not of same exacting MGM standards that are evident in all other "Forbidden Planet" props, and suggests it may have been custom-made for the filming of this "Twilight Zone" episode.However this version of the prop survives and is currently also owned by William Malone.In other appearances, Robby usually retained the moving parts inside his transparent dome, although the details of his "brain" and chest panel were sometimes altered; in "The Man from U.N.C.L.E."