This was a catch-all term applied by the then INS ( Immigration and naturalization service) for aliens ( human, not outer-space hailing from countries that were either at war with, or considered hostile to, the United States. This should be carefully distinguished from refugees from political violence and so-called D.P."s or displaced persons. Enemy Alien has a negative cast, and these folks could be held in protective custody or deported. Applied to Germans and Austrians in World War I, Germans, Japanese, and Itallians in War II, and Russians at various times in the cold war .
An Alien Enemy - 1918 was released on: USA: 1 April 1918
The cast of Enemy Alien - 1975 includes: Stanley Jackson as Narrator
Ben 10 Ultimate Alien - 2010 The Enemy of My Enemy 1-18 was released on: USA: 3 December 2010
the hive
You may be referring to Dennis Quaid in "Enemy Mine".
Alien Nation The Enemy Within - 1996 TV is rated/received certificates of: UK:12
Enemy Mine
1. A resident Alien 2. Non- resident Alien 3. enemy Alien 4. Refugees 5. illegal Alien
to poo
Enemy Mine
Ben 10 Ultimate Alien - 2010 The Enemy of My Frenemy 2-25 was released on: USA: 11 February 2012
"The Ultimate Enemy Part 2" is the Final episode of Ben 10 Ultimate Alien.