- Screenplay
- Screenplay (1951)
- as Klaatu
- as Helen Benson
- as Regina Jackson
- as Jacob
- as Prof. Barnhardt
- as Michael Granier
- as John Driscoll
- as Colonel
- as Mr. Wu
- as Dr. Myron
- as Rouhani
- as William Kwan
- as Student
- as Laptop Woman
- as Plainclothes Agent
- as Agent Driver
- as Yusef
- as Grossman
- as Civil Engineer
- as Winslow
- as Helicopter Scientist #1
- as Helicopter Scientist #2
- as Helicopter Scientist #3
- as Sergeant
- as Scientist #1
- as Scientist #2
- as Guardswoman
- as NYPD #2
- as Soldier #1
- as Soldier #2
- as Soldier #3
- as Soldier
- as Cop
- as Medic #1
- as Medic #2
- as Medic #3
- as Technician
- as General Quinn
- as Regina's Aide
- as Dr. Ikegawa
- as Grey Man
- as Military Policeman
- as Polygraph Operator
- as Guardsman
- as Train Passenger #2
- as Arguing Evacuee
- as Transit Cop
- as Army Fighter Pilot #1
- as Army Fighter Pilot #2
- as Target Tech
- as Flash Chamber Colonel
- as News Anchor
- as Flash Chamber Engineer
- as Flash Chamber Tech
- as Field Commander Communications Officer
- as General
- as Truck Driver
- as Coffee Cup Guy
- as Herself - German Chancellor (Archive footage)
- as Himself - Russian Prime Minister (Archive footage)