LOS ANGELES » Sherwood Schwartz, writer-creator of two of the best-remembered TV series of the 1960s and 1970s, “Gilligan’s Island” and “The Brady Bunch,” has died at age 94.

Grandniece Robin Randall said Schwartz died at 4 a.m. Tuesday at Cedars-Sinai Medical Center, where he was being treated for an intestinal infection and underwent several surgeries. His wife, Mildred, and children had been at his side.

Sherwood Schwartz and his brother Al started as a writing team in TV’s famed 1950s “golden age,” said Douglas Schwartz, the late Al Schwartz’s son.

“They helped shape television in its early days,” Douglas Schwartz said. “Sherwood is an American classic, creating ‘Brady Bunch’ and ‘Gilligan’s Island,’ iconic shows that are still popular today. He continued to produce all the way up into his 90s.”

Neither “Gilligan” nor “Brady” pleased critics, but both managed to reverberate in viewers’ heads through the years as few such series did, lingering in the language and inspiring parodies, spinoffs and countless stand-up comedy jokes.

Schwartz had given up a career in medical science to write jokes for Bob Hope’s radio show. He went on to write for other radio and TV shows, including “The Adventures of Ozzie and Harriet.”

He dreamed up “Gilligan’s Island” in 1964. It was a Robinson Crusoe story about seven disparate travelers who are marooned on a deserted Pacific island after their small boat wrecks in a storm.

TV critics hooted at “Gilligan’s Island” as gag-ridden corn. Audiences adored its far-out comedy. Schwartz insisted that the show had social meaning along with the laughs: “I knew that by assembling seven different people and forcing them to live together, the show would have great philosophical implications.”

He argued that his sitcoms didn’t rely on cheap laughs. “I think writers have become hypnotized by the number of jokes on the page at the expense of character,” Schwartz said in a 2000 Associated Press interview.

“Gilligan’s Island” lasted on CBS from 1964 to 1967, and it was revived in later seasons with three high-rated TV movies.

TV writers usually looked upon “The Brady Bunch” as a sugarcoated view of American family life. During the 1970s when the nation was rocked by social turmoil, audiences seemed comforted by watching an attractive, well-scrubbed family engaged in trivial pursuits.

Schwartz claimed in 1995 that his creation had social significance because “it dealt with real emotional problems: the difficulty of being the middle girl; a boy being too short when he wants to be taller; going to the prom with zits on your face.”

The series lasted from 1969 to 1974, but it had an amazing afterlife. It was followed by three one-season spinoffs: “The Brady Bunch Hour” (1977), “The Brady Brides” (1981) and “The Bradys” (1990). “The Brady Bunch Movie” was a surprise box-office hit in 1995.

Actress Florence Henderson, who played Carol Brady in the series, called Schwartz “a wonderful teacher in life, and again, in death, he taught us how to leave with dignity and courage.”

Sherwood Schwartz was born in 1916 in Passaic, N.J., and grew up in Brooklyn, N.Y.