With the third #TotalSF movie night approaching fast on Dec. 5, the Chronicle's Peter Hartlaub and Heather Knight welcome "Sister Act" superfan and Sisteractivist Sarah Katz-Hyman, who runs the @SisterActivism Twitter account, to talk about the film's greatness. They talk about Whoopi Goldberg's time in San Francisco, and Katz-Hyman makes a case for the underappreciated "Sister Act 2: Back in the Habit." #TotalSF hosts "Sister Act" at 7 p.m. Thursday, Dec. 5, at the Balboa Theatre in S.F. Buy tickets here.

Produced by Peter Hartlaub. Music is "The Tide Will Rise" by the Sunset Shipwrecks off their album "Community."

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