How can you not feel at least a little sad about this?

Suzanne Pleshette, the husky-voiced actress who redefined the television sitcom wife in the 1970s, playing the smart, sardonic Emily Hartley on “The Bob Newhart Show,” died Saturday at her home in Los Angeles. She was 70.

Ms. Pleshette died of respiratory failure, her lawyer, Robert Finkelstein, told The Associated Press. Ms. Pleshette had undergone chemotherapy in 2006 for lung cancer.

A native New Yorker, Ms. Pleshette already had a full career on stage and screen in 1971 when producers saw her on “The Tonight Show With Johnny Carson” and noticed a chemistry between her and another guest, Mr. Newhart. She was soon cast as the wife of Mr. Newhart’s character, a mild-mannered Chicago psychologist, and the series ran six seasons, from 1972 to 1978, as part of CBS’s ratings-winning Saturday night lineup.

She was scheduled to get her star on the Hollywood Walk of Fame next week.