Chris (Short for Christine) is a friend of Verne Brown.
Verne first met Chris after attempting to retrieve his baseball, only for her to catch and throw it back to the field from a good distance. Impressed by her throwing and not knowing she was a girl (due to the way she wore her hat), Verne invited Chris to play with his team.
The two went to the comic store where they found a poster for the Bob Brothers All-Star International Circus and took an interest in the circus, only to find it went out of business after April 10, 1933. Verne came up with the idea to use the DeLorean time machine so that he and Chris could visit the circus during that year.
The two of them, along Marty arrived on April 7 and attended the circus, only to be disappointed with the performance. During the circus, Marty is used as a human cannonball, with the Delorean's carburetor being damaged as a result. Though Chris provided him with a bobby pin to help fix it.
While waiting for the carburetor to fully be repaired, Chris and Verne discovered that the circus is in debt to farmer Mac Tannen.
Shortly after accidentally causing damage to Mac's farm, the two were put to work at the circus to pay off their debts, but then decided to hand out free tickets, as well as doing acrobatics when the trapeze artists quitting.
They perform well with the use of floating belts that were made by Doc, though Chris' hat fell off, which briefly distracted Verne. Though their act is a success, Verne avoids her the rest of the time as he was reluctant to be friends with a girl.
Sometime after arriving back to 1992, Verne comes around after Chris showed up to hand him his baseball and the two remain friends.