"Iron Man"

Most summers, a $300 million-plus blockbuster such as this would have been the heavy hitter of the season. But Robert Downey Jr.'s entry into the superhero business turned out to be the leadoff batter for the half-billion-dollar smash "The Dark Knight." Downey stars as boozy, womanizing billionaire and inventor Tony Stark, whose abduction by terrorists leads him to build a high-tech, gadget-loaded metal suit and embark on a crusade to save the world and boost his healthy ego a bit more. (Single DVD, $29.99; two-disc DVD and Blu-ray sets, $39.99 each.)

"Forgetting Sarah Marshall"

The latest installment from the Judd Apatow comedy machine elevates "How I Met Your Mother" co-star Jason Segel to lead status after a long apprenticeship as a supporting player in producer Apatow's productions. Segel plays a chump newly dumped by his girlfriend (Kristen Bell), a TV star vacationing with her new beau at the same Hawaiian resort as our heartbroken hero, who tries to put his troubles behind him with the help of some new pals and an enticing hotel employee (Mila Kunis). (Single DVD, $29.98; three-disc DVD set, $34.98; Blu-ray, $39.98; DVD comedy collection, $64.98; Blu-ray comedy collection, $89.98.)

TV on DVD:

"My Name Is Earl: Season 3" (DVD set, $49.98.)

"Numb3rs: The Fourth Season" (DVD set, $61.99.)

"Sports Night: The Complete Series -- 10th Anniversary Edition" (DVD set, $69.99.)

-- Associated Press