Turns out there was actually a deleted scene featuring Bran in which Sansa asked the all seeing Three-Eyed Raven for help.
Wright also talked about what was happening in Winterfell this season, particularly the events that unfolded regarding Sansa, Arya, and Littlefinger.
So she goes to Bran, and Bran tells her everything she needs to know, and she’s like, ‘Oh, s—.’”
Speaking to Variety, actor Isaac Hempstead Wright spoke about how Bran will handle telling Jon about being a Targaryen, concluding that Sam should probably handle everything.