“Weakness” follows the life of high school teacher Joshua Palansky (Bobby Cannavale), whose world is crumbling around him: his wife, Elizabeth (June Diane Raphael), wants to start swinging; his mother, Lenore, thinks she has terminal cancer; and his autistic brother, Pete, only connects outside of himself through baseball and explosive fits of rage. When Elizabeth leaves him, Joshua retreats from his adult life and responsibilities and begins dating Danielle (Danielle Panabaker), a former student who has put off attending college. Joshua’s regression and indecision fail to mask his anger and hurt, leading to a series of events—unplanned but not unexpected—that force him to reconsider not only his decisions, but the ways both subtle and profound that people affect one another. (Dir. Michael Melamedoff)