It's hard to believe that two decades have passed since Mystery Science Theater 3000 made it not only safe but hip to poke fun at cornball science fiction movies, but the episodes contained in this limited-edition set prove that the Peabody Award-winning program has lost none of its irreverent edge over the passage of time. The majority of the four episodes featured in the set come from the show's later incarnation; series creator Joel Hodgson is featured in an early effort, First Spaceship to Venus from Season 2, while head writer turned host Mike Nelson commands the Satellite of Love for Season 7's Laserblast (which brought MST3K's tenure on Comedy Central to an end) as well as Werewolf and Future War from its ninth and tenth season, respectively. Fans will undoubtedly debate the merits of this quartet as opposed to other episodes, but the pop culture references and machine-gun quips still feel fresh, and the low-tech charm of the skits (Joel's junk drawer in Venus; Mike in atrocious drag leading the 'bots in a girl-group tune inspired by Werewolf) remain inspired and even radical compared to most TV sitcoms. It's a rarity to find a comedy program that hasn't lost a few touches since its departure from the airwaves, but MST3K retains virtually all of the elements that made it a favorite for comedy and cult movie fans alike. In addition to the four complete episodes, the chief appeal of the 20th Anniversary edition--aside from the fun, lunchbox-style metal case--is a four-part history of the show told by its key players. Everyone from Hodgson and Nelson to J. Elvis Weinstein (Dr. Forrester's early sidekick and composer of the show's theme song) contributes their recollections of the show's inception, its tenures with Comedy Central and The Sci-Fi Channel, and the debacle surrounding its big-screen effort. Rare clips from its earliest days as a late-night cable offering in Minnesota, as well as behind-the-scenes footage, make this a must-have for series devotees, though one wonders why no mention of the participants' subsequent, MST3K-like projects (Nelson with Rifftrax and The Film Crew, and Hodgson with most of the core creative team on Cinematic Titanic) is included. A short featurette devoted to all six versions of the theme song is a fun touch, as are colorful new lobby cards for each feature, and even a Crow T. Robot figurine, suitable for riffing duty on your next bad movie night. --Paul Gaita