Nina Shelton was on staff with Children's Television Workshop from 1990 until 1998. Initially a production assistant on Sesame Street, Shelton was promoted to producer on Big Bag, and was key in developing the "Troubles the Cat" segments. She also contributed scripts to the Muppet portions of the series.
Shelton appeared onscreen as the mother of a young girl in Episode 3352. In 1998, she made a cameo appearance in the video Big Bird Gets Lost, as a store clerk in the cans department.
Since leaving CTW, Shelton has written freelance for such children's series as Barney & Friends, Cyberchase, and Out of the Box, and produced the HBO youth news show What Matters.