DVD/Blu-ray releases
What season had a gag reel?
The Big Bang Theory
 Despite the third, fourth, fifth, and sixth seasons receiving Blu-ray releases in conjunction with their DVD releases, the first and second seasons were only available on DVD upon their time of release. Warner Bros. has since released the first two seasons on Blu-ray/DVD combo packs with UltraViolet downloads on July 10, 2012. All of the episodes from seasons 1 & 2 on Blu-ray received newly remastered surround-sound audio, with the first season sporting a never-before-seen gag reel, which was not included during the initial first season DVD release.