Miss Piggy and Reese Witherspoon have a heated rivalry but when the two volunteer for Habitat for Humanity, their feud escalates to a whole new level. Meanwhile, Fozzie and his girlfriend hit a rough patch.

Kermit is scrambling to find the perfect birthday gift for Denise, so he turns to Miss Piggy for help. Meanwhile, Kristin Chenoweth agrees to do a gig with The Electric Mayhem and inadvertently causes a rift between the band.

Kermit is feeling the pressure at work and is forced to go to a private Yoga retreat where he runs into a stressed out Jason Bateman. Meanwhile, with Kermit out of the office, Scooter is left to run the show and things go from bad to worse.

After a show-stopping duet with Miss Piggy on “Up Late with Miss Piggy,” Joseph Gordon-Levitt joins Scooter, Pepe, and the gang for poker night. The Great Gonzo gears up to perform his dream stunt and Dave Grohl challenges Animal to a drum-off.

The gang is preparing for the annual “Up Late” live Christmas special with, special guest Mindy Kaling. Animal is in charge of tinsel, Sweetums hangs the lights, Sam Eagle strategically places the mistletoe – everything is in order. Or so it seems. Meanwhile, Miss Piggy offers relationship advice to Fozzie, which forces her to reevaluate her relationship with Kermit. Yolanda rigs the Secret Santa gift exchange, and Echosmith performs at the crew’s Christmas party.

The whole crew just returned from hiatus, and everyone is rested, recharged and ready to get back to work. But when a new branding guru comes in to revamp "Up Late," the gang rallies together and realizes that they don't need gimmicks and hijinks; they just need each other and a couple of familiar tunes to get them back on track.