Michael Sacks is wonderful as Pilgrim and it left me wondering why he didn't go on to become a huge star. Apparently he left Hollywood an went on to become an executive director for Morgan Stanley which shows the kind of brain power he possessed. The rest of the cast is definitely second fiddle to Sacks but there were a few memorable performances.
The strongest scenes are those when Pilgrim was a soldier during WW II. Not only is Sacks fantastic in these scenes but fellow soldiers Edgar Derby [Eugene Roche] and Paul Lazzaro [Ron Leibman] from a powerful trio together. Roche [Webster, Magnum PI] is a wonderful character actor who gives the film its compassion. Leibman [Norma Rae] brings a spirit of vengeance and terror to the lives of everyone in the film. These three are a delight to watch as they flesh out their characters.
As a final note the scenes shot during WW II are the best in the movie. They are done so lovingly well, especially the bombing of Dresden. If all filmmaking were this good, we would be most fortunate indeed. Slaughterhouse-Five is not technically a horror film, but it could be classified as a Sci-Fi thriller that is brutally honest about the human condition. It should be seen by everyone who loved cinema.
For more info check out the film's entry in IMDB.