Are you sure you're not thinking of 2001: A Space Odyssey. No 'Douglai' were in that but Leonard Rossiter was - he looks a little similar to them but wasn't in that particular role. I see Kirk is still kicking too - over 100 now. Stuff that.
No, I know that film well. This is a different one and it definitely had one of the Douglai in it. It is very old, nearly as old as Kirk.