This can be radio shows or podcasts. I listen to the following or have listened to a lot of the following:
Catholic Stuff
Catholic Answers Live
Father Corapi
Kresta in the Afternoon
Non-Catholic Stuff
Ravi Zacharias
Stewart McAllister
John MacArthur
Allistair Begg
And some, but less of
Bible Answer Man
Ask the Pastor (Gregory Dickow, I think)
Catholic Stuff
Catholic Answers Live
Father Corapi
Kresta in the Afternoon
Non-Catholic Stuff
Ravi Zacharias
Stewart McAllister
John MacArthur
Allistair Begg
And some, but less of
Bible Answer Man
Ask the Pastor (Gregory Dickow, I think)