I happened to be watching STAR CRASH last night, a blatant but oddly enjoyable knockoff of Star Wars. Starring Seventies pin-up Caroline Munro and lots of fun model kit mash-ups, it also features the above 'head in a dome'.
For some reason it made me think of the domed pilot at the rear of the SWORD space glider knockoff, the Space Tract by Mego [not THE Mego, a different one]. There's no real similarity now I can see them both but aliens and spacemen in domes are a staple of Sci-Fi. Are there any more from either movies or toys you can think of readers?