Liz Breadon and Craig Cashman, running for the District 9 council seat being vacated by Mark Ciommo, are scheduled to meet in a candidates forum at 6 p.m. on Monday, Oct. 28, at WGBH, 15 Guest St.

The forum is sponsored by the Brighton Allston Improvement Association, the Allston and Brighton boards of trade and the Ward 21 and Ward 22 Democratic committees.