She debuted her career as one of the children in a production of ‘The Sound of Music’.
where she visited her grandparents in Faith, South Dakota.
In 1970, Bach graduated from Stevens High School in Rapid City, South Dakota and briefly studied drama as a major at UCLA where she supplemented her income by making clothes for friends and theatre groups.
Bach had concerns about the appropriateness of the cut-off shorts at first, saying she could not wear them in a restaurant scene.
When prompted by the producers to visit a restaurant across the street, Bach found the waitresses were wearing "little miniskirts that matched the tablecloths! In 2006, she guest-starred on Monk, and in 2010 had a small cameo in the comedy film You Again.
After that, she married David Shaw on May 15, 1976. But, the pair also could not hold the relationship and end with divorce on August 5, 1981.
Apart from her marriage, she was also in a relationship with several people.
She graduated from Stevens High School in Rapid City, South Dakota in 1970 and later studied drama as a major at UCLA.
She supplemented her income by making clothes for friends and theater group.
Catherine’s father belongs to German ancestry whereas her mother belonged to Mexican descent.
She grew up in South Dakota and visited her grandparents in Faith, South Dakota. Catherine holds American citizenship and her ethnicity is a mix of German and Mexican.
Bach's first screen appearance was in the Burt Lancaster murder mystery, The Midnight Man, shot in upstate South Carolina in 1973, in which she played the murdered coed, Natalie Claiburn.