The Muppets appeared throughout the show's fourth season (branded as Holey Moley: Fore-Ever), which premiered on May 3, 2022. The Muppets were employed by Riggle to help ensure the series gets renewed for another season, with recurring plotlines including Pepe the King Prawn kidnapping Stephen Curry and Miss Piggy preparing a big musical finale.
The Muppet cast for the season includes Kermit the Frog, Miss Piggy, Fozzie Bear, Pepe the King Prawn, Animal, the Swedish Chef, Camilla the Chicken, Statler and Waldorf, Big Mean Carl, Larry, Lew Zealand, Sam the Eagle, Bobo the Bear, Joe the Legal Weasel, and Uncle Deadly.
Credited performers include Matt Vogel, Bill Barretta, Eric Jacobson, and Julianne Buescher. Dave Goelz and Peter Linz performed in an uncredited capacity. Barretta is also credited as a director for certain Muppet segments.
A teaser video for the season featured a vocal cameo from Kermit, yelling "Fore!" as a golf ball baring his likeness crashes into the screen.
Episode 401: "Holey Moley, it's the Muppets!"
- Airdate: May 3, 2022
In the season four premiere, Rob Riggle recruits Kermit the Frog and company to help ensure that the series will get renewed for another season amid (fictional) budget cuts. He fields suggestions from Fozzie Bear, and later Animal, Camilla the Chicken, and the Swedish Chef. This results in starting to plan a big production number finale and Pepe the King Prawn kidnapping Stephen Curry.
Episode 402: "You're Gonna Need a Lawyer"
- Airdate: May 10, 2022
Rob thanks Kermit for agreeing to help save "Holey Moley." Kermit suggests that they get a big star to help with the big finale and says there's one star he knows that can do it. Rob asks if he knows "Weird Al" Yankovic, to which Kermit clarifies that he meant Miss Piggy. Later Pepe appears with the still-kidnapped Stephen Curry to introduce one of the holes.
Episode 403: "Bear, Bear, BEAR!"
- Airdate: May 17, 2022
Rob meets with Miss Piggy at an autograph signing to recruit her to help with the big finale. Pepe takes some cellphone pictures of Stephen Curry, who is still tied-up and gagged.
Episode 404: "Pepe's Ransom Plan Continues"
- Airdate: May 24, 2022
Pepe attempts a ransom video with Stephen, which results in the two instead getting their own sitcom pilot at ABC.
Episode 405: "Can You Feel The Urge?"
- Airdate: May 31, 2022
Rob now gets Kermit to recruit the other Muppets to help save the show, including Big Mean Carl (and his rabbit Larry), Animal, the Swedish Chef, and Camilla. Statler and Waldorf also appear.
Episode 406: "Is That Iron Man?"
- Airdate: June 7, 2022
Episode 407: "Night of Music!"
- Airdate: June 14, 2022
Episode 408: "No Touchy-Touchy!"
- Airdate: June 21, 2022
Rob dines with Piggy as they discuss the plans for her big, distractor finale. Later, Uncle Deadly introduces her to Jeannie Mai, who will serve as her understudy. Statler and Waldorf also appear.
Episode 409: "Is This Guy Weird?"
- Airdate: July 5, 2022
Rob attempts to woo Miss Piggy with some classic romantic comedy tropes.
Episode 410: "The Greatest Game"
- Airdate: July 12, 2022
Kermit joins Tessitore and Riggle in the booth once again for the first round of male competitors. Meanwhile, Miss Piggy prepares for her big number as the final hole distractor, but gets locked in her trailer. Statler and Waldorf also appear to close out the season.