First thing I saw him in was Time Bandits , he played a great hammy villain, chucking fireballs about and blowing up his minions on a whim.

Didn't recognise him as Chancellor Gorkon from Star Trek 6 at the time, but it was a great performance. Same thing when he played Gul Maldred in the "4 lights" episode in TNG.

Helluva talented guy