The 4K UHD optical disc format (also known as Ultra HD Blu-ray, 4K Ultra HD, etc.) is a media format designed as an advanced version of the Blu-ray format. Debuting in 2016, its adoption has been slow, leading to the shelving of a potential 8K version. Although based on Blu-ray technology, 4K UHD discs are not compatible with standard Blu-ray players.
To date, there have been no Mystery Science Theater 3000 4K UHD releases. The only associated discs, so far, are two releases from Blue Underground of films with additional RiffTrax presentations included as a bonus.
RiffTrax[]
In 2005, Mike Nelson and Legend launched RiffTrax, an online service where Mike (and, eventually guests) would riff various films, releasing only an .mp3 of the riff, thereby circumventing the need to license the films or limit themselves to public domain features. RiffTrax themselves have not released any 4K UHD discs, but have licensed their material for use as bonus material.
- The Girl from Rio, September 26, 2023 - Blue Underground w/ bonus RiffTrax VOD (4K UHD & Blu-ray)
- The Million Eyes of Sumuru, September 24, 2024 - Blue Underground w/ bonus RiffTrax VOD (4K UHD & Blu-ray)
- The Blood of Fu Manchu, July 29, 2025 - Blue Underground w/ bonus RiffTrax VOD (4K UHD & Blu-ray)
- The Castle of Fu Manchu, July 29, 2025 - Blue Underground w/ bonus RiffTrax VOD (4K UHD & Blu-ray)