An alien and a robot land on Earth after World War II and tell mankind to be peaceful or face destruction.
Star Trek: Insurrection
1998
Stowaway
2021
Finch
The Arrival
1996
Impostor
2001
Automata
2014
I Am Mother
2019
Terminator Genisys
2015
Moon
2009
Close Encounters of the Third Kind
1977
Arrival
2016
Silent Running
1972