: Blu-ray and 4K Ultra HD versions of seasons 1 through 3 have been released by Paramount Home Entertainment , typically featuring Dolby Digital 5.1 English audio with additional language options depending on the region. Season Guide (Available Content) Main Theme Season 1 Rising Islamic extremist threat (Suleiman) Season 2 Political corruption and warfare in Venezuela Season 3 A "Bond-like" espionage mission in Europe involving Russia Season 4 Corruption within the CIA and a cross-border conspiracy

6 Episodes. Now the CIA Acting Deputy Director, Jack uncovers internal corruption and a deadly drug-terrorist alliance.