Teletoon at Night was a late night programming block that aired on Teletoon. It primarily carried adult animation and other programming targeting teen and adult audiences.

While the network had carried programming targeting teen and adult audiences during the prime time and late night hours since its inception, Teletoon first established formal brands for such programming—The Detour on Teletoon and Teletoon Unleashed—in October 2002. In 2004, the "Unleashed" brand was dropped, with the Detour branding used for the entirety of the block

It was similar in format to Adult Swim, a late-night programming block that aired on Cartoon Network, from which the block acquired most of its programming. Teletoon would later launch a Canadian version of Adult Swim as part of its own Cartoon Network channel in 2012; the two blocks operated in parallel, although most Adult Swim original series would later migrate to the new channel, and Teletoon at Night's acquired content would focus on non-Adult Swim series and animated sitcoms, as well as films.

In 2019, the block was discontinued in favour of the new Adult Swim channel. The block's French counterpart, Télétoon la nuit, continues to air on sister network Télétoon.^[1]

Prior to the launch of The Detour on Teletoon and Teletoon Unleashed, Teletoon had aired a lineup of adult-targeted programming (which were mixed alongside animated series aimed at teenagers) during the nighttime hours since it was launched on October 17, 1997. Teletoon at Night's roots lie in 2 former programming blocks that aired on Teletoon: the teenage-oriented block formally known as "The Detour", and the adult-oriented "Teletoon Unleashed" block, which had been dropped due to lack of new content (90% of the series had only a single season with 13 episodes, which would get re-arun frequently).^[2] Teletoon Unleashed was also known for airing every program with an 18+ content rating, so as to attract an adult audience, regardless of their actual content. In September 2004, the two blocks were amalgamated, with all-new branding created by Guru Studio.^[3] For the start of the 2006–2007 season, a new Friday night companion block, F-Night, debuted, featuring a slightly different lineup, mainly comedy series from Adult Swim (such as Tom Goes to the Mayor and Squidbillies).^[4] In 2009, the block was rebranded as "Teletoon at Night".

With the launch of the Canadian version of Adult Swim (via the Canadian version of Cartoon Network) on July 4, 2012, most of the original programming from the American service migrated to its Canadian counterpart.^[5]

In the summer of 2014, films on Saturdays were branded as the "Saturday Night Funhouse Double Feature".^[6] Meanwhile, Teletoon acquired broadcast rights to The Awesomes, a Hulu original series.^[7] In October 2014, Bento Box Entertainment, the studio that produces The Awesomes, announced they would be producing a new slate of shows for Teletoon at Night.^[8] In the same month, Blue Ant Media, Mondo Media, and Corus announced that Teletoon at Night would air a new series featuring shorts from Bite on Mondo, a program in which content creators pitched ideas for several new TV series.^[9] It was later revealed on Adult Swim's Facebook page that the new series, dubbed Night Sweats, would air on Adult Swim instead.

During the week of September 1, 2015, it was announced on air that, on that date, several of the block's shows would move to Adult Swim.^[10][11][12] In a press release posted on September 3, 2015, it was announced that the block would now air Mondays through Thursdays starting at 10:00 p.m, with a film at 11:00 p.m. Teletoon's Superfan Friday block expanded in Teletoon at Night's place.^[10][13] It was later announced in December 2015 that, starting on January 4, 2016, Teletoon at Night would be adding more films to their schedule and their remaining shows moved over to Adult Swim.^[14]

In February 2016, several TV series that were airing on Adult Swim began airing on Teletoon at Night. On February 24, 2016, it was announced in a press release that the seventh season of Archer would air on both blocks.^[15] In the same month, Teletoon at Night's website revealed that its Fred at Night segment would be discontinued after six years, with the final installment airing on February 25, 2016.^[14] On March 23, 2016, it was revealed that Archer's seventh season would instead air on Teletoon at Night, although the season premiere did air in simulcast on Adult Swim.^[16]

On March 4, 2019, along with the announcement that Action would relaunch as a full-time Adult Swim channel on April 1, 2019, it was also announced that Teletoon at Night would be discontinued.^[17] The block aired for the final time on April 1, 2019, at 3:00 a.m..