Television
Heidecker and Wareheim created, wrote, and starred in Tom Goes to the Mayor, a limited animation series that aired from November 2004 to September 2006 on Adult Swim. Heidecker plays Tom, the protagonist of the show who continually brings his ideas to the Mayor (played by Wareheim) only to have them thwarted in most cases, leaving Tom worse off than when he started. According to their website, Wareheim and Heidecker had mailed copies of an early version of the show to comedian Bob Odenkirk, who agreed to take on the project as the executive producer of the series and sold it to Adult Swim.
The duo's second show, Tim and Eric Awesome Show, Great Job!, premiered in 2007, on Adult Swim. They also created and starred in Tim and Eric's Billion Dollar Movie, and appeared together as debt collectors on the Adult Swim special Young Person's Guide to History and have made guest appearances in the movie Let's Go to Prison, as well as the Scottish video game series VideoGaiden and a Version 2 episode of Mega64. Heidecker also had a small role in the 2011 film Bridesmaids, and a leading role in the 2012 independent drama The Comedy, directed by Rick Alverson and also starring Wareheim. In July 2012, Heidecker starred in an episode of Workaholics. In 2012, he guest starred in Dinosaur Jr.'s music video "Watch the Corners". In the same year, Heidecker made a cameo appearance on the independent movie reviewing site, Red Letter Media. Heidecker appeared in an episode of the RedLetterMedia series, "Half in the Bag." The episode is titled "Season Finale: Step Up Revolution." Within the short sketch comedy, Heidecker plays a VCR repairman named "Tim". Shortly after his introduction into the scene, he flies through the ceiling and makes his exit from the skit.
Heidecker starred in a series of films for Absolut Vodka's website with Wareheim and Zach Galifianakis. In 2010, Heidecker and Wareheim directed a series of Old Spice commercials starring actor Terry Crews. Using characters and skits from Awesome Show, Heidecker and Wareheim (via their Abso Lutely Productions company) created an online-only show called "Tim and Eric Nite Live!," originally broadcast on the website SuperDeluxe.
Since 2012, Heidecker has hosted a parodic web series and podcast called On Cinema, where he and special guest (Gregg Turkington) discuss films from past and present. In 2013, an On Cinema Film Guide app was released, featuring the voices of Heidecker and Turkington reviewing over 17,000 films. Heidecker, Wareheim, Sarah Silverman, Michael Cera, and Reggie Watts announced on the podcast Comedy Bang! Bang! that they were starting a comedy YouTube channel called Jash.
Since 2016, Heidecker has hosted the podcast and web series Office Hours Live along with Vic Berger and Doug Lussenhop. It features phone and video calls with fans, comedians, musicians, and political commentators.
The duo's anthology horror series, Tim and Eric's Bedtime Stories, aired on Adult Swim from 2014 to 2017. A sitcom starring the duo, Beef House, premiered in March 2020.
On October 23, 2020, Heidecker released his first stand-up comedy special, An Evening with Tim Heidecker, on YouTube. Filmed in the style of a typical standup special, Heidecker's special is a parody of the format in which he deliberately plays a hack stand-up comic.
In December 2020, Heidecker and Turkington launched the HEI Network internet platform, independently run, with subscriptions to finance and distribute On Cinema, after all of Adult Swim livestream programs were cancelled.
On April 20, 2026, satirical publication The Onion announced that it would be taking control of the far-right conspiracy outlet Infowars, with Heidecker announced as the new "creative director" of the site, planning to create satirical content under the moniker. Heidecker stated in an interview, "I just thought it would be just a beautiful joke if we could take this pretty toxic, negative, destructive force of Infowars and rebrand it as this beautiful place for our creativity." The Onion announced that a share of merchandise proceeds would be sent to Sandy Hook families. Tim had initially contacted The Onion about collaborating when they previously attempted to acquire Infowars in 2024. The show later featured Heidecker dying, which The Onion presented as fact with memorials and merch, but the death itself was a satirical fabrication.
