LOS ANGELES - Suzanne Pleshette, the beautiful, husky-voiced film and theater star best known for her role as Bob Newhart's sardonic wife on television's long-running "The Bob Newhart Show," has died, said her attorney Robert Finkelstein. She was 70.

Pleshette, who underwent chemotherapy for lung cancer in 2006, died of respiratory failure Saturday evening at her Los Angeles home, said Finkelstein, who is also a family friend.

"The Bob Newhart Show, a hit throughout its six-year run, starred comedian Newhart as a Chicago psychiatrist surrounded by eccentric patients. Pleshette provided the voice of reason.

Four years after the show ended in 1978, Newhart went on to the equally successful "Newhart" series in which he was the proprietor of a New England inn populated by more eccentrics. When that show ended in 1990, Pleshette reprised her role from the first show in one of the most clever final episodes in TV history.

It had Newhart waking up in the bedroom of his "The Bob Newhart Show" home with Pleshette at his side. He went on to tell her of the crazy dream he'd just had of running an inn filled with eccentrics.

"If I'm in Timbuktu, I'll fly home to do that," Pleshette said of her reaction when Newhart told her how he was thinking of ending the show.