A year later, she played psychiatrist Elizabeth Dehner (who studied the long-term effects of space on a crew) in "Where No Man Has Gone Before", the second pilot for "". Three months after that, Kellerman played Mag Wildwood in the original Broadway production of "Breakfast at Tiffany's", directed by Joseph Anthony and produced by David Merrick, which closed after four preview performances. Before the closing the musical numbers were recorded live, and she recorded three songs which appeared on the original cast recording.