These are 2 episodes first of which was broadcast on 11th March 1974 on the radio called - Sergeant Wilson's Little Secret. The second episode was first broadcast on 15th April 1974 called Something Nasty in the Vault.
On a cold, miserable night in Michigan’s Upper Peninsula, a night that wouldn’t feel so unusual if it wasn’t the Fourth of July, an antique wooden boat runs full-speed into a line of old railroad pilings in the shallow waters of Waishkey Bay. When Alex McKnight helps rescue the passengers, he finds three men. The driver is out cold, the other two are dazed but conscious. When they’re all finally back on dry land and sent...