How many movies have Michael Dorn and Michael Piller collaborated on?

They have worked on 4 movies together! Their first movie together was Star Trek: The Next Generation - All Good Things... (1994) while their highest rated movie together was Star Trek: The Next Generation - Time's Arrow (1995). They have not worked together since Star Trek: The Next Generation – The Best of Both Worlds (2013). They are most known for their science fiction films together.