Those tuning in to the Stumble finale will be treated to an epic reunion between cheer coach Courteney Potter (Jenn Lyon) and her own former coach — Marg Hargberg.
Courteney has voiced complaints about her old coach throughout the season, but now, viewers finally get to meet her, and she certainly measures up to the hype.
A scene from the finale’s trailer shows that Courteney hasn’t been exaggerating about how Marg treated her. (Watch the full finale episode on Friday, March 13 at 8:30/7:30c on NBC or stream it starting the next day on Peacock).
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The meeting goes down at the cheerleading championships in Daytona, Florida, where the Buttons — the squad at Headltston State Junior College that Courteney coaches — are competing after working hard all season to qualify.
“I can’t believe my old coach is here,” Courteney says to the cameras in the mockumentary after spotting Marge at the championships. As she explained it, Marg used to “really scream at me and say very mean things about my legs. She gave me PTSD.”
And the situation wasn’t about to get any better.
Courteney decided that she wasn’t going to let Marg get to her anymore because, “I’m a grown and very accomplished woman now.” So, she brought the cameras over with her as she approached Marg to say hello.
But Marg was still stuck in the past, and full of insults. “I would recognize those weird legs anywhere,” Marg told Courteney. “Too big to fly, too small to base.”
What’s worse, to Courteney’s horror, Marg revealed that she’s one of the judges in the competition, causing Courteney to stress that Marg would grade her squad unfairly.
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If Marg looks familiar to you, that’s because she’s played by none other than accomplished actress Katey Sagal.
To find out where you may have seen Sagal before, keep reading.
What TV shows and movies has Katey Sagal been in?
Sagal is best known for portraying Peggy Bundy — the wife of disgruntled shoe salesman Al Bundy (Ed O’Neill) — on the sitcom Married… with Children from 1987–1997. Peggy was known for her big hair and even bigger personality, a stay-at-home wife who loved spending Al’s money, of which there wasn’t much.
If Sagal’s voice sounds familiar even if you don’t think you’ve seen her face before, then you might know her from the animated sci-fi sitcom Futurama. On the series — which debuted in 1999 and has had several iterations on different networks and streamers over the years — Sagal voices one-eyed Turanga Leela, the captain of the Planet Express Ship.
As for other long-running series that Sagal has starred in, they include the crime drama Sons of Anarchy (where she played Gemma Teller Morrow) and the sitcom 8 Simple Rules (where she played Cate Hennessy).
She had a recurring role as Louise on the sitcom The Conners, which was a continuation of Roseanne. And she’s had guest-starring roles on other popular series including That ’70s Show, Boston Legal, CSI: Crime Scene Investigation, Lost, Glee, This Is Us, Brooklyn Nine-Nine, Shameless, and most recently, One Piece.
When it comes to film, Sagal starred in the 2022 horror Torn Hearts, and had a role in the 2025 thriller Trust. Some of her other movies include Pitch Perfect 2 (2015), Jack and the Beanstalk (2009), and The Good Mother (1988).
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Be sure to catch Sagal as Marg Hargberg in the Stumble finale — Episode 13 and titled “Daytona” — airing Friday, March 13 at 8:30/7:30c on NBC and available to stream starting the next day on Peacock.