For Morgan, who calls himself the biggest Rancid fan, Armstrongs casting was a leap of faith.
I wrote [Home Again] with him in mind, Morgan tells EW.
Armstrong was on board, andThe X-Filesgot more than a guest star out of the deal.

Credit: Ed Araquel/Fox
The set you see, the artists studio, thats all his artwork, Morgan says.
Along with Gillian Andersons daughter, who worked in the art department.
Piper did a lot of the work in the Trashmans studio.
Morgan teases the episode as a showcase of Andersons talents as well.
Gillian Anderson is extraordinary, he says.
I just want everybody to see her performance.
I would go on and on about how extraordinary Gillian is.
The X-Filesairs Mondays at 8 p.m. on Fox.