Back to the Future (A+), directed by Robert Zemeckis, is a triumph of imaginative storytelling as it creates its own universe of time travel and a most unusual intersection of one man’s destiny with his family. Michael J. Fox is the charismatic lead teenager who journeys from 1985 to 1955 with the help of an obsessed scientist (played with salty delight by Christopher Lloyd) and must manipulate events so his parents (Lea Thompson and Crispin Glover) fall in love. The complication is that our hero’s mom falls for him instead, and this potentially treacly Oedipal impasse yields more incredible comedy. Everything works here: the complex theories behind the science, the nostalgic fish out of water comedy, the tender and empowering moments, the Huey Lewis music. Zemeckis is a master of raising the stakes, providing an increasingly exhilarating tale. This is a good time from start to finish.

Ivan Reitman’s Ghostbusters (B+) is a marvelous confection about four exterminators of ghastly spirits (droll Bill Murray, goofy Dan Akroyd, uber-serious Harold Ramis and straight man Ernie Hudson) who must save New York from a Pandora’s box of supernatural creatures run amok. Sigourney Weaver is a treat as a possessed love interest, playing giddily opposite Bill Murray’s clowning. Despite the overindulgence in silly special effects, the acting ensemble makes this piece work by playing it super-serious. The biggest laughs are in the reaction shots: Of course that’s a skyscraper sized marshmallow man! And why wouldn’t there be demonic animals running in the street? Leading man Murray is a superb match for this material with his dry wit a ribald rapier to the funky fleet week of ghosts on the loose. Reitman corrals his grinning brigade into hilarious territory as the ‘busters take on haunted New York!