It was a show where you were given a quote out of current events and you had to identify who said it. I was reading eight newspapers a day and had compiled a file of about 300 quotes. I really had to do my research. The White House press didn't have to bone up on any of it.

Lockhart appeared as Dr. Lockhart starred as James Caan's mother in an episode of Las Vegas in 2004. In February 2013 Lockart began filming for Project Fedora (working title) a video game that combines live-action footage with 3D graphics.

She is remembered as the mother in two TV series Lassie and Lost in Space. Janet Craig on the CBS television sitcom Petticoat Junction (1968–70).