I guess the producers saw me and knew I was literate and I always tried to be alert and it's funny because you have to have a sharpness to do those shows, especially some of the ones I did in later years.

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).