Mad Dog is a fictional character portrayed by Garry Chalk in the TV series The X-Files.
In the first episode they appeared in, titled Babylon (season 10), they were 63 years old.
They appear in 1 episodes out of a total of 217 aired
Episodes1
Babylon
episode S10.E5 february 2016When a terrorist ends up in a coma, a pair of younger FBI agents ask Mulder and Scully for help communicating with the man, resembling them when their adventure first began and reminding them of just how far they have come.