Who played Andy Griffith's girlfriend Mary?

Answer 1

There were two Mary's. We Julie Adams appear as county nurse, Mary(no last name) in 'The County Nurse' on 3/19/62. Sue Ane Langdon appeared as Mary Simpson in 'Three's A Crowd' which aired on 4/9/62. A bit of trivia is that this is the first time we see Andy kiss a date.