<P> When the two couples travel together to Las Vegas, Bob and Carol reveal Carol's affair to Ted and Alice . Ted then admits to an affair on a recent business trip to Miami . An outraged Alice demands that this new ethos be taken to its obvious conclusion: a mate - sharing foursome . Ted is reluctant, explaining that he loves Carol "like a sister," but eventually acknowledges that he finds her attractive . After discussing it, all four remove their clothes and climb into bed together . Swapping partners, Bob and Alice kiss fervently, as do Ted and Carol; however, after a few moments, all four simply stop . </P> <P> The scene cuts to the couples walking to the elevator, riding it down, and walking out of the casino hand - in - hand with their original partners . A crowd of men and women of various cultures and races congregate in the casino parking lot, wherein the four main characters exchange long stares with each other and with strangers, reminiscent of the non-verbal communication shown in the early scene at the retreat . Over this final scene, the film's theme song reminds the viewer that "what the world needs now is love ." As Bob and Carol and Ted and Alice look into each partner's eyes, the credits roll . </P> <Ul> <Li> Natalie Wood as Carol Sanders </Li> <Li> Robert Culp as Bob Sanders </Li> <Li> Elliott Gould as Ted Henderson </Li> <Li> Dyan Cannon as Alice Henderson </Li> <Li> Horst Ebersberg as Horst </Li> <Li> Lee Bergere as Emilio </Li> <Li> Donald F. Muhich as Psychiatrist </Li> <Li> Noble Lee Holderread Jr. as Sean Sanders </Li> <Li> K.T. Stevens as Phyllis </Li> <Li> Celeste Yarnall as Susan </Li> <Li> Lynn Borden as Cutter </Li> <Li> Greg Mullavey as Group Leader </Li> <Li> Linda Burton as Stewardess </Li> <Li> Leif Garrett as Jimmy Henderson </Li> </Ul> <Li> Natalie Wood as Carol Sanders </Li>

Who played in bob carol ted and alice
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