Despite tackling countless cases over the course of its near decade-long run, there was always one frustrating mystery that "The X-Files" refused to solve:

The mystery of why Mulder and Scully, two red-blooded American agents who were both single and clearly made for each other, spent week after week not ripping each other's pants off and getting down to some unofficial FBI business.

On a show that once featured a giant sentient tapeworm as the antagonist, it was the long-simmering, never-addressed sexual tension between its heroes that truly made absolutely no sense.

But finally -- FINALLY! -- it's happened: With thanks to Jimmy Kimmel, Mulder (David Duchovny) and Scully (Gillian Anderson) reunited for a field trip to a secret government alien storage facility, where they finally did the grownup on the alien autopsy table.

Grab your popcorn and watch the magic happen below.