(written from a Production point of view)
Josephine Parra, also known as Jo Summers,  is an actress who worked as stand-in for guest actress Jean Simmons on the Star Trek: The Next Generation episode "The Drumhead". She received no credit for this work but is listed on several call sheets of the episode. Parra worked between 19 February 1991 and 22 February 1991 and between 25 February 1991 and 27 February 1991 on Paramount Stage 8 and 9.
Parra earned credits for her appearances in the Dragnet episode "The Big Boys" (1954, with Leonard Nimoy), the Sea Hunt episode "The Manganese Story" (1958, with Dick Dial), the western The Left Handed Gun (1958), the Perry Mason episode "The Case of the Renegade Refugee" (1961, with Paul Lambert), and The Third Man episode "The Day of the Bullfighter" (1964).
She previously had background parts in the comedy Honeymoon (1947), the adventure movie Tarzan and the Slave Girl (1950, with Fred Carson), and the western Apache Drums (1951, with Sherry Jackson). Further films in which she worked as background actress are the drama This Earth Is Mine (1959, starring Jean Simmons), Stanley Kubrick's drama Spartacus (1960), and the crime drama The Money Trap (1965, with Ricardo Montalban, Parley Baer, William Campbell, and George Sawaya).