Wednesday Happenings

Mumbles

If you're a Bostonian, do your civic duty and watch the mayoral debates tonight, so that you don't just vote for any damn body. If you're not a Bostonian, consider that our city is the primary reason that your city or town is a nice place to live and join our politics vicariously. Bostonist doesn't know of any particular bars that will be showing the debates, but if you get a crew together, you could probably persuade the bartender to flip over from the Sox game for an hour. By the next debate, we'll have a drinking game for you. Promise. Any place with a television, WBZTV, 7 p.m. Free. More information.

Classical Music

It's the second-to-last concert of the season for the Boston Landmarks Orchestra, and, tonight, it offers a smattering of "Green Masterpieces," works with an environmental theme. Along with compositions by Felix Mendelssohn, Leopold Mozart, Camille Saint-Saëns, and Claude Debussy, also catch The Story of Frederick Law Olmsted, composed by Thomas Oboe Lee and narrated by none other than Michael Dukakis. Hatch Memorial Shell, Esplanade, 7 p.m. Free. More information.

Movies

Johnny Cash's 1968 recording Johnny Cash at Folsom Prison remains one of the greatest masterworks in American popular music, and its backstory, which starts with Cash on the skids and ends with a redemptive triumph, makes for some great storytelling. The documentary Johnny Cash at Folsom Prison (2009) reflects on both the album's context and its legacy. Remis Auditorium, Museum of Fine Arts, 6 p.m., through September 6. $10/$8.