"The Thing" directed by John Carpenter at age 34
"Silent Running" directed by Douglas Trumbull at age 30
"The Hitchhiker’s Guide to the Galaxy" directed by Garth Jennings at age 33
"Tron" directed by Steven Lisberger at age 31
"Close Encounters of the Third Kind" directed by Steven Spielberg at age 31
"The Abyss" directed by James Cameron at age 35