‘Lost Girls,’ streaming, Netflix

Having debuted at the Sundance Film Festival, the gritty and powerful 95-minute feature “Lost Girls” details the late Mari Gilbert’s tenacious pursuit of justice for her murdered daughter.

Movie: ‘We Summon the Darkness’

“We Summon the Darkness” (Saban, streaming on Amazon Prime) bills itself as a low-budget Satan-worship-themed slasher film with a bit of an homage to 1980s horror movies thrown into the mix.

Movie: ‘Slay the Dragon’

In their well-crafted but distinctly partisan documentary “Slay the Dragon” (Magnolia), filmmakers Barak Goodman and Chris Durrance present a wide-ranging exploration of the history and current status of the practice of gerrymandering.