I'm pretty sure I saw this on MST3K(and it was hilariously bad). Chris Plummer apparently said he got a free trip to Rome out of it, and that he'd do porn for a free trip to Rome. Can't say I blame the guy.Starcrash (1978)
Oh my god but this is some incredibly bad sub-Flash Gordon / Star Wars nonsense. There's some sort of daredevil Han Solo/Barbarella-ish pilot called Stella Star (seriously), and she starts off an outlaw, gets captured, coerced into saving the Galactic Empire and ends up a heroine. The script is incredibly garbage, random nonsense: I could believe the director didn't even speak English. It's like someone checked out popular SF movies and a load of cliches and rammed them all together with no coherence whatsoever. Stella, for instance, is both able to kick ass when convenient to the plot, and yet at other times a damsel in distress screaming "Help me!" and falling over when imperilled (perhaps unsurprising in those impractical heels). Christopher Plummer is in this: Christ but he must have had a lot of rent to pay. It's also got a very early role for David Hasselhoff. There is however, one big plus to this movie: Stella is played by Caroline Munro who was, shall we say, formative in my early pubescent realisation of female attractiveness, so it's got a certain nostalgia value.