Fox Mulder and Dana Scully as Rob Petrie and Laura Petrie

Dana Scully while undercover as Laura Petrie, with Fox Mulder (otherwise known as Rob Petrie)

Laura Petrie (to be pronounced "pett-rie") was an alias used by Dana Scully. She assumed the name while investigating The Falls at Arcadia with Fox Mulder, who meanwhile took the name Rob Petrie. According to the back-story that they established, Laura had met Rob at a UFO convention and was a fan of "new age stuff," like crystals and mood rings. Supposedly, Laura's nickname for Rob was "poopy-head."(TXF: "Arcadia")

This name was actually taken from The Dick Van Dyke Show, starring Mary Tyler Moore as Laura Petrie (pronounced Pet-Tree).