CBS' The Great Indoors may in part be about the age gap between Joel McHale's adventure writer Jack and the 20-something coworkers he now manages, but it's important to remember that Jack was once a young whippersnapper, too.

Clark (Christopher Mintz-Plasse) and Mason (Shaun Brown) find that out in this Thursday's episode (8:30/7:30c on CBS) while emptying out Jack's storage locker, uncovering a treasure trove of relics from the '90s and giving them a better idea of the kind of man Jack used to be when he was their age. So naturally, they scoop up everything of Jack's and decide to throw a '90s-themed party at Eddie's (Chris Williams) bar.

And we have the pictures — complete with pastel colored jumpsuits and half-strapped overalls (was Jack in TLC?) — to prove it. Oof, did we actually dress like that back then?

Christopher Mintz-Plasse and Shaun Brown, <em>The Great Indoors</em>Christopher Mintz-Plasse and Shaun Brown, The Great Indoors Chris Williams and Shaun Brown, <em>The Great Indoors</em>Chris Williams and Shaun Brown, The Great Indoors Christopher Mintz-Plasse and Shaun Brown, <em>The Great Indoors</em>Christopher Mintz-Plasse and Shaun Brown, The Great Indoors Christopher Mintz-Plasse and Joel McHale, <em>The Great Indoors</em>Christopher Mintz-Plasse and Joel McHale, The Great Indoors

Elsewhere in the episode, digging through Jack's storage unit lets the younguns in on a huge secret of Jack's love life.

The Great Indoors airs Thursday nights at 8:30/7:30c on CBS.

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