Corman movies blended with MST3K’s tone perfectly, and episodes featuring his movies were among the best.
Corman produced and/or directed the movies in episodes 311- IT CONQUERED THE WORLD, 315- TEENAGE CAVEMAN, 317- VIKING WOMEN AND THE SEA SERPENT, 406- ATTACK OF THE GIANT LEECHES, 503- SWAMP DIAMONDS, 511- GUNSLINGER, 618- HIGH SCHOOL BIG SHOT, 701- NIGHT OF THE BLOOD BEAST, 703- DEATHSTALKER AND THE WARRIORS FROM HELL, in 1104- AVALANCHE, 1203- LORDS OF THE DEEP, 806- THE UNDEAD, THE DAY THE WORLD ENDED (riffed by fans in Sci-fi Channel’s “MST3K: The Home Game”) and DEATHSTALKER II, featured in the 30th Anniversary Tour in 2018. He also appeared in an uncredited role as a corporate executive in the movie in 1203- episode LORDS OF THE DEEP.
The New York Times has a look back.
Thanks to Tim for the heads up.