There’s nothing like a serial to keep people coming back. The idea has worked in literature, on movie screens, and on TV. It hasn’t been seen much onstage, but last February, Greater Boston got its own theatrical serial, “Blood Rose Rising,” the story of a local history professor, his lawyer girlfriend, and his other girlfriend, who just happens to be a ghost from the Victorian era.

The brainchild of former Actors’ Shakespeare Project artistic director Ben Evett, with a script co-written by local theater veteran Steve Barkhimer, “Blood Rose Rising” debuted at the Davis Square Theatre in Somerville with “Immaterial Girl.” A second episode, “Heir of Suspicion,” was promised “in a month or so,” but the serial went on hiatus in early March and didn’t reappear till September, when “Heir of Suspicion” began performances at Naga in Cambridge’s Central Square.