Mortal Sin
Mortal Sin is a show at the Edinburgh Festival Fringe 2026, performing at Gilded Balloon Teviot. It has 24 performances listed, running from Wed 5 Aug, 12:20 to Mon 31 Aug, 12:20. The run has finished — every listed performance has taken place.
About this show
JFK'S been shot and Colm and Peggy want a day off school. Sure, they got one when the Pope died? Follow two best friends as they stage a protest to honour the slain U.S president. A bold, heartfelt and hilarious exploration of growing up different in an Ireland where the church controls everything from the classroom to confession. Mortal Sin is ultimately a celebration of friendship; a small but defiant stand against the shame that shaped a generation. Colm and Peggy stick it to the man... well, Sister Assumpta anyway! 1/2 (TheReviewsHub.com). (TheArtsReview.com).
Details
- Venue: Gilded Balloon Teviot
- Space: Wee Room
- Genre: THEATRE, New writing, Comedy
- Country: IRELAND
- Running time: 60 minutes
- Room size: about 50 seats (Wee Room) — the Fringe box office sells a share of the room, not all of it
- Performances listed: 24, of which 0 still to come and on sale
Accessibility
- Wheelchair access: level
- Access features: Step-free access, Accessible toilet
- Venue notes: Accessible entry: All venues and bars are accessible by level access or internal lift. Ramp access available via both the front Bristo Square entrance and the rear Charles Street Lane entrance Wheelchair access type:Level Access, Lift (Building Lift) Stairs: 6 - 10 Number of stairs is provided as guidance and is not in addition to any wheelchair access type (lift/ramp etc) stated above.
What the reviewers said
We have captured 7 published reviews and 21 audience reviews for this show from the Edinburgh Festival Fringe’s own listing. The excerpts below are the reviewers’ words, not ours — follow each link for the full review.
The script is sharp as a knife and cuts to the bone meaning laughter and tears soon become easy bedfellows. It would be a mortal sin against quality acting to miss this.
— Corr Blimey (5 out of 5 stars)
Their performances are beautifully judged, their friendship feels completely authentic, and there is a real excitement in knowing that this is hopefully only the beginning of what both can do, together and apart.
— The Nerd Party (4 out of 5 stars)
We laugh with them, we share their ambitions, and we see tragedy through their eyes. Precisely and wittily written by Benjamin Reilly, this is an emotional account of two young rural Irish people preparing to conquer…
— The Real Chrisparkle (5 out of 5 stars)
Performance dates and ticket availability
- Wed 5 Aug, 12:20 — Already performed — £11.00
- Thu 6 Aug, 12:20 — Already performed — £11.00
- Fri 7 Aug, 12:20 — Already performed — £11.00
- Sat 8 Aug, 12:20 — Already performed — £14.00
- Sun 9 Aug, 12:20 — Already performed — £14.00
- Tue 11 Aug, 12:20 — Already performed — £14.00
- Wed 12 Aug, 12:20 — Already performed — £14.00
- Thu 13 Aug, 12:20 — Already performed — £14.00
- Fri 14 Aug, 12:20 — Already performed — £14.00
- Sat 15 Aug, 12:20 — Already performed — £14.00
- Sun 16 Aug, 12:20 — Already performed — £14.00
- Tue 18 Aug, 12:20 — Already performed — £14.00
- Wed 19 Aug, 12:20 — Already performed — £14.00
- Thu 20 Aug, 12:20 — Already performed — £14.00
- Fri 21 Aug, 12:20 — Already performed — £14.00
- Sat 22 Aug, 12:20 — Already performed — £14.00
- Sun 23 Aug, 12:20 — Already performed — £14.00
- Tue 25 Aug, 12:20 — Already performed — £14.00
- Wed 26 Aug, 12:20 — Already performed — £14.00
- Thu 27 Aug, 12:20 — Already performed — £14.00
- Fri 28 Aug, 12:20 — Already performed — £14.00
- Sat 29 Aug, 12:20 — Already performed — £14.00
- Sun 30 Aug, 12:20 — Already performed — £14.00
- Mon 31 Aug, 12:20 — Cancelled — £14.00