Investigation Discovery (stylized and branded on-air as ID since 2008) is an American multinational pay television network dedicated to true crime documentaries, similar to corporate sibling HLN.

ID was originally launched as the Discovery Civilization Network, and focused on world history and geography.

[5] On March 25, 2003, the channel was rebranded as Discovery Times, focusing more on the culture of the United States, as well as other miscellaneous programming.

[8] In 2016, owing to a resurgence in popularity within the true crime genre, ID was the second-highest-rated cable network among women 25–54.

[10] On April 12, 2020, Investigation Discovery introduced a new logo, placing a greater focus on the "ID" initialism to make it better-suited for multi-platform use.

[12] Most of ID's programs are original productions, but it also airs re-titled off-network reruns, including ABC's 20/20, CBS' 48 Hours, and NBC’s Dateline.