This is the week for dual roles....

This is the week for dual roles. Sunday and Monday at 9 p.m. on NBC, Stefanie Powers plays twin sisters in the new, four-hour Deceptions, adapted by Melville Shavelson from the Judith Michael’s novel. One sister is a suburban housewife, unhappily married to Barry Bostwick. The other is a jet-setter, and they decide to exchange identities for one week--with unexpected results. Deceptions has a starry cast that includes Gina Lollobrigida and Brenda Vaccaro. (See Show of the Week on Page 5.)

Come Tuesday at 9 p.m. on CBS, it’s Judd Hirsch’s turn to take on dual roles. In the new TV movie Brotherly Love, Hirsch plays a successful New Haven, Conn., industrial designer who’s stalked by his twin brother, a psychopathic killer. Brotherly Love was adapted by the late Ernest Tidyman, Oscar-winning writer of “The French Connection,” from the William Blankenship novel.

Ironically, Richard Crenna compares the macho police officer he plays in the new TV movie The Rape of Richard Beck (ABC Monday at 9 p.m.) to “The French Connection’s” bruising Popeye Doyle. But Crenna’s Richard Beck has ingrained hostile attitudes about women who are sexually assaulted when he’s trapped by thugs and raped as an act of humiliation. (Obviously, ABC is urging parental discretion.) The Rape of Richard Beck was directed by Karen Arthur from James G. Hirsch’s script.

Scheduled opposite each other at 8 p.m. on Tuesday are two vintage Westerns, Burt Kennedy’s amiable 1967 The War Wagon (on Channel 5), featuring John Wayne, Kirk Douglas and Howard Keel engaged in some amusing horseplay, and William Wyler’s 1958 epic-scale The Big Country (on Channel 13), in which Gregory Peck, Charlton Heston and a host of others (including Oscar-winning Burl Ives) get caught up in a battle over water rights. (The Big Country concludes Wednesday at 8 p.m.)

Airing Tuesday at 9 p.m. on ABC (opposite CBS’ Brotherly Love) is another new TV movie, When Dreams Come True. In this complicated-sounding thriller, Cindy Williams plays a tour guide whose dream that she meets a handsome stranger while fleeing from some shadowy character comes true. Meanwhile, her own romance with policeman Lee Horsley crumbles when he becomes obsessed with tracking down a serial killer. John Llewellyn Moxey directed from William Bleich’s script.

Let’s hope that Anthony Hopkins and Lesley-Anne Down fare better in the TV movie remake of Erich Maria Remarque’s Arch of Triumph (CBS Wednesday at 9 p.m.) than Charles Boyer and Ingrid Bergman did in Lewis Milestone’s unsuccessful 1948 film version. Hopkins is a fugitive German doctor and Down a beautiful, homeless drifter who fall in love in Paris on the eve of World War II. Arch of Triumph was directed by Waris Hussein from Charles Israel’s adaptation of the Remarque novel.

It’s hard to imagine Douglas Trumbull’s ill-fated Brainstorm (Channel 5 Wednesday at 8 p.m.) on TV when all it had going for it were some special effects that looked very impressive on the wide screen. Brainstorm convincingly prophesizes the invention of a device that enables us to videotape one’s thoughts, memories, fantasies and emotions, only to be short-circuited by plot confusion. Sadly, the film proved to be Natalie Wood’s last. Christopher Walken and Louise Fletcher co-star.

Airing Friday at 9 p.m. on CBS is a repeat of the TV movie Listen to Your Heart, a romantic comedy in which Kate Jackson and Tim Matheson try to mix romance and work.

Although it never makes up its mind whether to scare or amuse, John Badham’s elegant version of Dracula (Channel 13 Saturday at 6 p.m.) boasts a splendid count in Frank Langella.

The tense 1949 thriller Hollow Triumph, starring Paul Henreid, airs on Channel 28 Saturday at 10 p.m.

Selected evening fare on the pay/cable services: Bye, Bye, Brazil (Galavision Sunday at 7:30); Alligator (Movie Channel Monday at 8); Heat of Desire (Z Monday at 9); Can She Bake a Cherry Pie? (ON Tuesday at 8:30); King’s Row (Z Tuesday at 9); Lonely Hearts (Movie Channel Tuesday at 10); Repo Man (HBO Wednesday at 10); Baby Doll (SelecTV Thursday at 7); Morning Glory (Z Thursday at 7:30); La Balance (Cinemax at 10:15); The Dead Zone (Z Friday at 7); Baby, It’s You (Showtime Friday at 8); Psycho (WGN Friday at 9:30); Android (HBO Saturday at 6:30, Z at 8:30); Greystoke (Showtime Saturday at 8); Under the Volcano (Movie Channel Saturday at 9).