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WWE SmackDown, also known as Friday Night SmackDown or simply SmackDown, is an American professional wrestling television program produced by WWE that currently airs live every Friday at 8pm ET on Fox. Fox Deportes simulcasts the program with Spanish-language commentary. The show features characters from the SmackDown brand, to which WWE employees are assigned to work and perform. The show is currently considered to be one of two flagship shows, along with Monday Night Raw.

SmackDown! debuted in the United States on UPN on April 29, 1999 and was formerly broadcast on Thursday nights. The show would move to Friday nights on September 9, 2005, and, after the merger of UPN and the WB, would begin airing on The CW in September 2006. The show would later move to MyNetworkTV in October 2008. On October 1, 2010, SmackDown moved to cable network Syfy, and would eventually return to Thursdays on January 15, 2015. The show then moved to the sibling USA Network on January 7, 2016, and later that year, beginning on July 19, 2016, SmackDown began broadcasting live on Tuesday nights. SmackDown's move to FOX on October 4, 2019 marked the show's return to Friday nights and over-the-air broadcast television (as well as the second time SmackDown has aired on a FOX-owned network).

SmackDown has been broadcast from 163 arenas, 148 cities and towns, seven countries: United States, Canada, United Kingdom, Iraq in 2003 and 2004 for Tribute to the Troops, Japan in 2005, Italy in 2007, and Mexico in 2011. Prior to switching to its current live format, taped episodes premiered a few hours earlier in Ireland and the United Kingdom and a day earlier in Australia, Canada, Singapore, and the Philippines than the United States, due to time differences. For international broadcast listings, see below. The show celebrated its 15th anniversary on October 10, 2014, and the 1000th episode on October 16, 2018.

The WWE Network has ceased operations in United States as of April 4, 2021, with all content in the process of being moved to Peacock TV, which now has all episodes of SmackDown. Recent episodes are still available for on-demand viewing 30 days after the original air date.