I would imagine that Captain Philip deLaurentis looks like a young
Jeremy Brett (particularly that picture, as Pip is an old soul who studied the ancient Greeks at the space equivalent of Oxford, which he still regards as one of the happiest times of his life, before everything went to hell), John "Deuko" Derwin would look like a young
Clint Eastwood, Juanita Escamilla like
Hepburn, and Mr Kestern Gouvener was originally based off
this drawing, but I now see him looking more like
Liev Schreiber sans facial hair.
Funny how I chose actors who played roles similar to the characterizations of my characters (Holmes, Solo, Golightly, Creed). Except not really, I guess.