Free movies at Memorial Hall return on Wednesday for a two-week summer run. “Wreck-It Ralph” will be shown at 6 p.m. on a big screen set up in the city-owned hall, which is air-conditioned. On Aug. 14, “Madagascar 3” will be shown at 6 p.m. Residents may bring snacks to eat. The free showings are made possible by the Victoria McLaughlin Foundation, a nonprofit set up by John and Patricia McLaughlin to honor their infant daughter who died in 2003.