Purely platonic co-workers...

Season 1 - #8 Space

Mulder: You never wanted to be an astronaut when you were a kid, Scully?

Scully: Guess I missed that phase.

Scully: (Shaking hands) Thank you. (Follows Mulder out the door) Didn't you want
                 to get his autograph?

Mulder: I have to admit, that fulfilled one of my boyhood fantasies.

Scully: Yeah, it ranks right up there with getting a pony and learning how to braid
                 my own hair.

Scully: So much for your boyhood hero.