Other than the convoluted mythology and end-of-series missteps, I love pretty much everything about The X Files. There are even a bunch of Robert Patrick episodes I think are pretty cool.

But one of my favorite things about the series lately, now that it’s seven years gone, is watching episodes and realizing just how many now-famous (and in a few cases, then-famous) people were on the show. Hardly an episode goes by wherein I don’t go, “hey, that’s so-and-so,” or at least “hey, that’s the girl in the new commercial for that detergent!”

(I watch way too much TV, I know.)

What follows is a list of 15 names recognizable to most contemporary television/film buffs. Only one of these people did not appear on The X Files. Can you figure out which one it is without resorting to IMDB?

Ryan Reynolds

Jack Black

Garry Shandling

Lily Tomlin

Luke Wilson

Sherilyn Fenn

Tom Noonan

Seth Green

Giovanni Ribisi

Felicity Huffman

Donal Logue

Lili Taylor

Jane Lynch

Shawnee Smith

Cary Elwes