Our Company

Our Mandate
Grindstone Theatre is committed to creating professional opportunities to local emerging artists through high quality theatrical productions.

Who We Are, What We Do
Grindstone Theatre is a non-profit Edmonton based theatre company established in 2011 by Founder and Artististic Director Byron Martin. Grindstone operates shows, classes and administration out of the Basement Theatre in Holy Trinity Anglican Church in Old Strathcona.

Grindstone is most well known for their improvised musical The 11 O’clock Number! but also produces main stage plays and musicals, produces Blackout Sketch Comedy, provides corporate entertainment, runs public classes, offers school workshops, school performances and free monthly events such as The Open Improv Jam and the Social Scene.

We believe that theatre can change lives for the better; for those who participate in the performing arts, for our audiences and for our community. Join us in making our community a better place through the arts.


In spring 2013, Grindstone registered as a Non-Profit Theatre Society. Extending into the corporate world, Grindstone has performed for The Liberal Party of Canada, Fountain Tire/United Way, Edmonton Potterwatch, HSBC, and Edmonton Children’s Dance Theatre.

The 11 O’Clock Number! The Improvised Musical, debuted January 11th, 2012, and now runs as a weekly show at the Basement Theatre in Holy Trinity Anglican Church. The show has toured theatre festivals across North America garnering outstanding reviews and has completed over 150 performances.

Aside from the weekly improv show, Grindstone Theatre is responsible for the monthly play reading, Edmonton Scene Study, which has been running since 2010. Each month actors, directors, writers, and theatre lovers are invited to share scenes from published plays, explore the vast world of theatre, and connect with fellow artists. The group is open to everyone and honors a special professional guest from the community to share their insights.

In April 2013, Grindstone mounted its first full scale musical production, HONK! The Ugly Duckling Musical, written by Anthony Drewe and George Stiles which is based on the classic Hans Christian Anderson tale of The Ugly Duckling. This uplifting musical garnered great reviews and heartfelt response from our audiences. Musical Director, Erik Mortimer, was nominated for a Sterling Award for Best Musical Direction.

In fall of 2014, Grindstone founded Blackout, a sketch comedy troupe that focuses on writing sketch through improvised scenes. Blackout debuted their first show at Edmonton’s NextFest 2015 and then to a nearly sold out run for The Edmonton Fringe Festival 2015 and 2016!

Grindstone presented The Adventures of Chucky and Reggie – Jr. dicks at the 2016 Edmonton Fringe Festival. An improvised detective duo featuring Rachel Kent and Mhairi Munro as Clarkdale’s finest 12 year old detectives; Chucky and Reggie.