June Lockhart, beloved mother figure from 'Lassie' and 'Lost In Space,' dies at 100

June Lockhart, beloved mother figure from 'Lassie' and 'Lost In Space,' dies at 100 37 mins ago June Lockhart, beloved for her roles in “Lassie” and “Lost In Space,” has died at 100. She died Thursday of natural causes at her Santa Monica home. Lockhart became a TV star as Ruth Martin in “Lassie” from 1958 to 1964 and as Maureen Robinson in “Lost in Space” from 1965 to 1968. Her warm portrayals endeared her to viewers, though she insisted her real-life persona was different. Lockhart’s career spanned films, TV dramas, and soap operas.