Development and filming Writer-director Frank Henenlotter met producer Edgar Ievins during the production of the former's 1976 short film
The Slash of the Knife, and the two eventually collaborated on an unrealized film project titled
Ooze. Henenlotter recalled, "We tried to get the money for
Ooze and couldn't, so I just wrote a film that could be made for far less money. Right out in front, I wrote a film that was designed to be made for a low, low budget." The resulting screenplay,
Basket Case, was written by Henenlotter as he walked around
Times Square, which he called a "seedy, wonderful atmosphere." He reportedly wrote the dialogue for the film on napkins while in the basement of a
Nathan's Famous.
Basket Case was shot on
16 mm film during long weekends throughout 1981. It had a budget of about , It was shot in part on Manhattan's
42nd Street, with the Hotel Broslin scenes shot in his friend Ugis Nigals' loft. The hotel's hallways and rooms were made from cloth by Hennenlotter, Ievins and others. Henenlotter did not have control over the post-production, and the result was dark, murky, and converted to a different aspect ratio.
Casting Henenlotter's friend Ilze Balodis recruited students from the
American Academy of Dramatic Arts to participate in the film's production, including Kevin Van Hentenryck, who was cast as Duane Bradley, and provided Belial's vocal effects in post-production.), actress Diana Browne (who played Dr. Judith Kutter), and Balodis herself (who made a cameo appearance as a social worker) had previously worked on
Slash of the Knife. Beverly Bonner was cast as Casey after Henenlotter saw her in the stage show
Women Behind Bars. She would later do a stage show called
Casey: 30 Years Later in 2012, set after the events of the film. Henenlotter's cousins Florence and Mary Ellen Shultz were cast as Kutter's nurses. Due to the film's low budget and its production running out of funding halfway through shooting, the remaining crew members took on multiple roles.
Special effects The special effects for Belial consist largely of a
puppet in some scenes and
stop motion in others. Henenlotter wore a latex glove to use as Belial's hand in scenes where it is seen attacking his victims, The puppet was designed by
Kevin Haney, modeled after a mold of Kevin Van Hentenryck's face, and operated by Henenlotter. The special makeup effects were done by Haney,
John Caglione Jr. (who also designed the young Belial puppet), Ken Clark, Nigals and Ievins.
Music The film's score was written and composed by Gus Russo, Harold "Clutch" Reiser, J. Keith Robinson, and Dave Maswick. The instruments used included an acoustic guitar, an electric Gibson guitar, a four-track tape deck, a
Polymoog, an
ARP String Ensemble, an
Echoplex, a piano, a kazoo, a cello, chimes, a gong, a timpani, and vibraphones. ==Release==