The Terminator (1984)

Reasons for my belief that X-Files was heavily influenced by The Terminator:

1. The alien bounty hunter played by Brian Thompson is similar in both appearance and function to the terminator played by Arnold Schwarzenegger.

2. Brian Thompson, the who played the alien bounty hunter on X-Files, played a punk alongside Bill Paxton in The Terminator.

3. Special Agent John Doggett, the agent brought in to find Fox Mulder in later seasons, is played by Robert Patrick, the same actor who, as T-1000, was brought in to find (and kill) John Conner in Terminator 2.

4. Later seasons of X-Files develop the mythology of super-soldiers who are part metal/part human, in much the same way Arnold Schwarzenegger's terminator model incorporates both flesh and robotic parts.