Sean Thomason is a senior writer-producer at RiffTrax, where he’s been writing full-time since 2009. Thomason performed alongside the crew onstage at the 2019 SF Sketchfest 'Day of the Shorts', the MST3K Reunion Show, and the group Batman v Superman riff. He has written for late night comedy shows, animated TV series, sketch comedy, and even a good old-fashioned newspaper comic strip.
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| 2019 | RiffTrax Live: Day of the Shorts: SF Sketchfest 2019 as Self |
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| 2025 | RiffTrax Live: TimeCop - Writer |
| 2025 | RiffTrax: Super Zeroes - Writer |
| 2024 | GrimTrax - Writer |
| 2022 | RiffTrax Live: The Return of Swamp Thing - Writer |
| 2019 | RiffTrax Live: Star Raiders - Writer |
| 2019 | RiffTrax Live: Day of the Shorts: SF Sketchfest 2019 - Writer |
| 2017 | RiffTrax Live: Summer Shorts Beach Party - Writer |
| 2016 | RiffTrax Live: MST3K Reunion - Writer |
| 2015 | RiffTrax Live: Santa and the Ice Cream Bunny - Writer |
| 2014 | RiffTrax Live: Santa Claus - Producer |
| 2014 | RiffTrax Live: Santa Claus - Writer |
| 2013 | Rifftrax Live: Starship Troopers - Writer |
| 2012 | RiffTrax Live: "Manos" the Hands of Fate - Writer |
| 2010 | RiffTrax Live: House on Haunted Hill - Writer |
| 2010 | Rifftrax Live: Reefer Madness - Writer |
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