On Tue, 27 Nov 2007 18:54:19 -0500, "J.F."
wrote:

Thanks. Anybody know whhat year they switched from a Cessna T-50 Bobcat to
a Cessna 310.

The T-50 was used in episodes 1 thru 39, the Cessna 310B in episodes
39 thru 72. The change occured in 1956.