From 1979, this finely detailed character study stars Dustin Hoffman and Meryl Streep as a couple on the verge of divorce. She leaves him and their young son, then resurfaces with a quest to get legal custody. In between, the movie is mostly about Hoffman’s single dad becoming a responsible, attentive father – and dealing with his son even when the boy is testing limits, as he does, memorably, with a small tub of ice cream. Justin Henry plays young Billy.