When Peer Gynt tries to find himself, he ends up in a fantastical realm where trolls exist and reindeer can be ridden.

Such is the world of the Henrik Ibsen play “Peer Gynt,” whose story elements were pulled from Norwegian folklore.

“Peer Gynt,” in turn, inspired Edvard Grieg to compose “In the Hall of the Mountain King.” That was used as incidental music for the play’s premiere in 1876.

Flock Theatre is staging “Peer Gynt” Saturday at Mystic Seaport Museum. See it while you can. Flock had to nix its earlier planned run at Wilcox Park in Westerly because some people involved in the production came down with COVID. It's uncertain whether those Westerly performances can be rescheduled.

"Peer Gynt" is directed by Derron Wood and Victor Chiburis. The cast features Eric Michaelian, Linda Loy, Courtney Leivers, Brian Olsen, Sarah Paprocki, Bill Steinmayer, Jon Wenc, Alyssa Christian, Kali Therrien, Julie Morrison, Kyijong Tenzin, and Ian Hopkins.

For people who are familiar with “Peer Gynt” and know how long it usually runs, have no fear: Flock has cut the original play so that the performance is under two hours.

“Peer Gynt,” 6:30 p.m. Saturday, Mystic Seaport Museum, 75 Greenmanville Ave., Mystic; suggested donation $20; flocktheatre.org.