June Lockhart was born June 25, 1925, so she was 40 on Sept. 15, 1965, when the series premiered.
Dr. Maureen Robinson
Is a biochemist at New Mexico College of Space Medicine (No Place to Hide).
In the early episodes and in the last few episodes she is much more pro-active as a crew member. In The Reluctant Stowaway she does a spacewalk to rescue her stranded husband.
Once found a Ouija board in her grandmother's attic (Ghost in Space).
Once flew over the Andes on Earth (The Ghost Planet).