1st Lieutenant Maria "Dish" Schneider (aka as Lt. Maggie Dish) was played by Jo Ann Pflug in the film and later by Karen Philipp in the television series. She was a nurse at the 4077th MASH during the Korean War.
About Lieutenant "Dish"Edit
Dish's role in the finished film was limited, as a large portion of her role did not make the final cut. A similar thing happened to the character in the television series. After being prominently featured as Hawkeye's love interest in the pilot, she appeared in only one further episode (#1.11) before leaving the show entirely. However, she continued to be featured in the opening credit montage sequence (wherein the M*A*S*H staff run toward approaching helicopters) for most of the show's run.