STAGE

Boston’s comedy thriller, “Shear Madness,” the story of murder by scissors above a trendy unisex beauty salon, became the longest-running non-musical in American theater history on Monday night. The play opened on Jan. 29, 1980, for a supposed 31-performance run at the Charles Playhouse Stage II on the edge of the city’s theater district. Monday marked its 3,225th consecutive performance, one more than “Life With Father,” currently listed in the Guinness Book of World Records (it ran from Nov. 8, 1939, to July 12, 1946). The longest-running musical is “A Chorus Line,” still going strong on Broadway after more than 5,100 performances.