June Lockhart, who became the archetypal TV mom of the 1950s and 1960s with her roles on the campy sci-fi series "Lost in Space" and alongside a collie and a little boy on the family drama "Lassie," died this week at age 100, her family announced on Saturday.

She died of natural causes at her home in Santa Monica, California, according to a spokesperson for the family.

Lockhart portrayed planet-hopping mom Maureen Robinson on producer Irwin Allen's "Lost in Space," which ran from 1965 to 1968 and was later very popular in syndication. From 1958 through 1964 she had played Ruth Martin, the mother of the young main character Timmy, on "Lassie."

"Lost in Space," which aired in the years leading to the first moon landing in 1969, adapted the castaway novel "The Swiss Family Robinson" to a s

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