Question: What erotic thriller/sexploitation film starred the Amercian actor Norman Fell who was most famous for his role as the landlord in the sitcom "Three's Company"?

Context articles: Stripped to Kill
Black Emanuelle
Norman Fell
Fatal Instinct
Nana (1985 film)
The Stone Killer
List of erotic thriller films
If It's Tuesday, This Must Be Belgium
The Smashing Bird I Used to Know
Flesh Gordon

Stripped to Kill is a 1987 erotic thriller/sexploitation film, it was directed by Katt Shea, and stars Greg Evigan, Kay Lenz & Norman Fell.
Black Emanuelle (Italian: "Emanuelle nera") is an Italian softcore sexploitation film from 1975 directed by Bitto Albertini.
 "Black Emanuelle" follows an erotic adventure of Mae Jordan (Laura Gemser), a globe-trotting, hedonistic investigative journalist and photographer known to her readers as "Emanuelle".
 This Africa set film was shot mostly in Kenya.
Norman Fell (born Norman Noah Feld, March 24, 1924 – December 14, 1998), was an American actor of film and television, most famous for his role as landlord Mr. Roper on the sitcom "Three's Company" and its spin-off, "The Ropers".
Fatal Instinct is a 1993 American erotic thriller comedy film directed by Carl Reiner.
 It parodies the erotic thriller movie genre, which at the time had reached its commercial peak.
 The film stars Armand Assante as a lawyer and cop named Ned Ravine who has an affair with a woman named Lola Cain played by Sean Young.
 Kate Nelligan stars as Ned Ravine's wife and Sherilyn Fenn stars as Laura Lingonberry, Ravine's secretary.
 The film's title is a combination of "Fatal Attraction" and "Basic Instinct", both of which starred Michael Douglas.
Naná is a 1985 Mexican musical, erotic and sexploitation film directed by Rafael Baledón.
 Based in the novel "Nana", by Emile Zola, the film exposes an exemplary manner the principles of the naturalistic novel.
 Her protagonist is a beautiful young woman of humble origins who seeks, through the high prostitution, access to a well-off.
 "Naná" symbolizes the degradation of the Second Empire.
The Stone Killer is a 1973 action thriller film starring Charles Bronson and directed by Michael Winner.
 It came out in between "The Mechanic" and "Death Wish", all three of which teamed up actor/director Bronson and Winner.
 Norman Fell and John Ritter appear as cops in this film, not too long before the TV series "Three's Company".
 Character actor Stuart Margolin plays a significant role; he also appeared in "Death Wish".
An Erotic thriller is a film genre defined by a thriller with a thematic basis in illicit romance or erotic fantasy.
 Though most erotic thrillers contain scenes of softcore sex, the frequency and explicitness of those scenes varies.
 If a film is a thriller with scenes of softcore sex or nudity, it is probably not an erotic thriller unless illicit romance or erotic fantasy is central to the dramatic conflict, as in "Body Heat", "Fatal Attraction", and "Night Eyes 3".
 Many crime thrillers, action films, and slasher films contain softcore sex and/or nudity but are not erotic thrillers.
 Likewise, if a film is not identifiably a thriller, it is probably not an erotic thriller but simply a work of softcore erotica or perhaps even erotic melodrama.
If It's Tuesday, This Must Be Belgium is a 1969 DeLuxe Color romantic comedy film made by Wolper Pictures and released by United Artists.
 It was directed by Mel Stuart, filmed on location throughout Europe, and features many cameo appearances from various stars.
 The film starred Suzanne Pleshette, Ian McShane, Mildred Natwick, Murray Hamilton, Sandy Baron, Michael Constantine, Norman Fell, Peggy Cass, Marty Ingels, Pamela Britton, and Reva Rose.
The Smashing Bird I Used to Know is a 1969 British drama/sexploitation film, directed by Robert Hartford-Davis and starring Renée Asherson, Patrick Mower, Dennis Waterman, Madeleine Hinde and Maureen Lipman.
 As with other Hartford-Davis films, "The Smashing Bird I Used to Know" contains elements from different genres including psychological drama and social commentary.
 It is best known however as a sexploitation piece featuring nudity, attempted rape and lesbianism.
 The film features the first screen credit of the then 15-year-old Lesley-Anne Down in a supporting role.
Flesh Gordon is an independently made 1974 American sexploitation film, an erotic spoof of Universal Pictures' first (of three) "Flash Gordon" serials from the 1930s.
 The film was produced by Walter R. Cichy, Bill Osco and Howard Ziehm and was co-directed by Howard Ziehm and Michael Benveniste, who also wrote the screenplay.
 The cast includes Jason Williams, Suzanne Fields and William Dennis Hunt.
 The film was distributed by Mammoth Films.