Theatre on Fire is a resident company at the Charlestown Working Theater and performs most of its shows at CWT, a charming brick Victorian firehouse located at 442 Bunker Hill Street in, well, Charlestown, obviously. Now, some people think, "Charlestown? Where the heck is that, next to outer Mongolia? How will I ever get there?!" But I know you're not one of those people.
In reality, Charlestown is quite close by and easy to get to, both by car and by T. There is plenty of free on-street parking on Main Street, Bunker Hill Street, and Medford Street (and a few spaces directly in front of the theatre if you get there soon enough). Our fine friends at CWT have put together a delightfully comprehensive page of directions, complete with driving and walking maps:
442 Bunker Hill Street
From the West, via Memorial Drive (Directions: Google)
Follow signs to Memorial Drive East. Do not take any turnoffs for Boston. After passing the Sonesta Hotel and Museum of Science, both on the right, continue through the traffic light and across the Gilmore Bridge into Charlestown.
After passing the 99 Restaurant and Whole Foods, both on the left, turn left at the next traffic light onto Main Street. Continue about 1/2 mile to the first stop sign, with the Charlestown Community Gardens on the right. Turn right at the stop sign onto Bunker Hill Street. The CWT is the first building on the right.