Dec. 14 at The Sentient Bean, the Psychotronic Film Society salutes well-heeled leading man Don Johnson, of “Miami Vice” fame, with a very rare public screening of one of his earliest (and strangest) movies, 1975’s sci-fi dramedy “A Boy and His Dog.”

Showtime is 8 p.m., with $7 admission for mature viewers.

Directed by crusty character actor L.Q. Jones and based on a series of stories written in the late 1960s by the idiosyncratic and provocative sci-fi author Harlan Ellison (one of the most esteemed sci-fi writers of all time), this edgy, low-budget flick is set in 2024 and stars a young Johnson as a teenage boy adrift in the post-nuclear wasteland of the Southwestern United States. His only companion is a very intelligent dog named Blood who can communicate with the boy telepathically. This oddball team forages for food, supplies and human companionship. Along the way, they must battle a motley assortment of androids, mutants and other dangerous futuristic ne’er-do-wells.

While a commercial flop when independently released to theaters in the mid-‘70s, “A Boy and His Dog” has amassed a solid reputation in the intervening decades as a bizarre, heady mind-trip of a film. It enjoys a fervent cult following worldwide, despite being essentially unknown in mainstream circles. Look for the the great Tony-, Emmy- and Oscar-winning Jason Robards (“Johnny Got His Gun,” “All the President’s Men,” “The Day After”) in a supporting role, and listen for an original score featuring keyboardist Ray Manzarek of the Doors.