Widows probably works best as a three-minute trailer (punchy and funny) or a longform miniseries (deep and complicated). It’s a movie, though, which means we’re stuck with a fitfully engaging, 129-minute feature that only occasionally gets out of gear. The film is actually based on a miniseries, broadcast in England in the 1980s. Adapted here by Gone Girl writer Gillian Flynn and director Steve McQueen, Widows tries to be a lot of different things: heist thriller, feminist statement, social-issue diagnosis. That’s a lot to bite off, and 129 minutes isn’t enough time for proper chewing.