On Nov. 22, the night before Thanksgiving, the Psychotronic Film Society’s weekly series of underappreciated or simply downright peculiar movies continues at downtown coffeehouse The Sentient Bean with the annual “Turkey for Turkey Day,” in which the organization showcases one of the most enjoyable duds ever made.

This year, it’s a rare public screening of the infamous sci-fi/horror clunker “Octaman.” This 1971 dud about a mutant beast that’s half-man and half-octopus (yep, you read that correctly) is almost impossible not to snicker at.

Written by the same man responsible for the far better 1954 flick “The Creature from the Black Lagoon,” and featuring the big-screen debut of future Oscar-winning special makeup effects master Rick Baker (the groundbreaking artist responsible for impressive work in such later films as “An American Werewolf in London,” the original “Star Wars,” “The Ring” and “Hellboy”), it’s a throwback to the glory days of cheesy “guy in a rubber suit” monster movies that has earned a loyal following among “bad movie” fans worldwide. 8 p.m. showtime, with discounts on craft beer and organic wine during the film (“Octaman” is custom-made for intoxication).