In 2006, Allen appeared in the Stan and Lois sketch on Norm Macdonald's comedy album "Ridiculous" (released by Comedy Central Records). In November 2008, Allen appeared as "Todd"—and was credited as "Todd Carlin"—in the Cinematic Titanic episode "Santa Claus Conquers the Martians" during the pre-movie sequence, introducing the movie to the crew. Additionally, Allen has been touring periodically at live shows with Cinematic Titanic, performing his stand-up routine. In 2010, Allen was featured as a sci-fi author in season two of "Party Down" and made a cameo in the film "The Mother of Invention" as Dr. Henry Miller. In 2011, Allen had a small role in the movie "Bad Teacher". In 2012, Allen played the salesman of a futuristic elder care center in "Life Begins at Rewirement," an episode of the ITVS/PBS sci-fi series "Futurestates". He also appeared in a recurring role on the CBS series "Mike & Molly". Dave also provided the voice of Frostferatu, among several other characters, in Cartoon Network's "Mighty Magiswords" episodes "Share and Share Dislike", "Hideous Hound", "Transylbabies", "Collection Infection", and "King of Zombeez", created by "MooBeard the Cow Pirate" creator, Kyle A. Carrozza. In 2017, Allen appeared as the recurring character Dave the Taxidermist in NBC's "Trial & Error".