Lockhart enthralled audiences as Dr. Maureen Robinson, the determined matriarch in “Lost in Space,” from 1965 to 1968. Throughout her long career, she has appeared in numerous TV shows, such as “Bewitched,” “Petticoat Junction,” “Magnum, P.I.,” “Step by Step,” and “Beverly Hills, 90210.”
In addition, Lockhart starred in almost 40 episodes of “General Hospital.” More recently, she has starred in the TV movie “Holiday in Handcuffs” (2006), the 2016 film “The Remake,” and an episode of “Grey’s Anatomy” (2006).