The Librarians (2014)

S4E10 And Some Dude Named Jeff

After Jenkins accidentally swaps bodies with a 28-year-old layabout named Jeff, he must navigate his way back to the Library to fix the mix-up. To succeed, he recruits Jeff's clueless Dungeons & Dragons buddies for assistance. Together, they race against the clock to prevent Jeff from unwittingly causing chaos and potentially ruining the Library forever.