From the show

My guest today was Dr David Johnston of Wesley Institute
It is there open day to day
This is from their Award Wining Tour
URL http://www.wesleyinstitute.edu.au/wi/Releases/WI_choir/

Current production
Fiddler on the Roof
http://www.wesleyinstitute.edu.au/wi/Releases/Fiddler_on_the_Roof.asp

I have a number of tickets to give away if you can email
radio@lachlan.biz
The answer to the question

What is David a Doctor of?