‘Source Code’ isn’t easy to decipher

Available this week on DVD:

“Source Code”: Jake Gyllenhaal keeps waking up as a stranger on a train. He has eight minutes to find a bomb, save Chicago and get the girl (Michelle Monaghan). Ready? Go! This distemporal thriller is even more disjointed than it means to be. (1:34; PG-13 for some violence including disturbing images, and for language) • •

“Dylan Dog”: The creepily comic adventures of a supernatural private eye (Brandon Routh) who battles monsters in the backstreets of New Orleans. (1:47; PG-13 for sequences of creature violence and action, language including some sexual references, and some drug material)

“Trust:” When Annie, a 14-year-old girl, is seduced by a 41-year-old Internet predator she knows only as “Charlie,” it tears apart her family. (1:44; R for disturbing material involving the rape of a teen, language, sexual content and some violence)

“Ironclad”: In 13th century England, a small band of rebel warriors defends Rochester Castle against the tyrannical King John’s army in this violent medieval action epic. (2:00; R for strong graphic brutal battle sequences, and brief nudity)