‘Gnomeo & Juliet’ lively as potted plant

Available this week on DVD:

“Gnomeo & Juliet”: A clever concept – Shakespeare’s tragic romance, with garden gnomes – gets bungled every which way in this CG-animated bore, full of second-rate puns, hackneyed scenarios and an overdose of Elton John tunes. The voices of James McAvoy, Emily Blunt, Michael Caine and Maggie Smith are put to no good use. (1:24; rated G) • •

“I Am Number Four”: Tapping into the same vein of teen melodrama that runs through the “Twilight” franchise, this silly adaptation of the popular Pittacus Lore book hurls a moody adolescent from outer space into the halls of a small-town American high school. The quarterback’s girlfriend falls in love with “John Smith,” and interplanetary trouble ensues. (1:44; PG-13 for intense sequences of violence and action, and for brief language) • •

“The Big Bang”: Antonio Banderas stars as a private detective hired to find a missing stripper in this surreal mystery filmed in Spokane. (1:41; R for strong sexual content, nudity, violence and language)