The 'Bonanza' boys are on DVD with the fourth season of their venerable Western series

“Tom & Jerry: Robin Hood and His Merry Mouse” (Warner/Blu-ray + DVD + Digital, 2012, $24.98, three cartoons). This straight-to-video hourlong cartoon has Tom and Jerry helping Robin Hood out of a jam. Bonus cartoons are a 2007 TV episode and two theatrical shorts from the 1950s.

“Dora’s Royal Rescue” (Nickelodeon/Paramount, 2012, $14.99, bonus episode). Double episode “Dora the Explorer” cartoon has Lady Knight Dora and Squire Boots on a quest to save Don Quixote.

“Dinosaur Train: Dinosaurs A to Z” (PBS Kids, 2012, $12.99, five episodes). More animated adventures mixing trains and dinosaurs to push preschoolers toward scientific thinking.

E-MAIL: hicks@desnews.com