[2] The half-hour program starring Grant Sullivan and Don Dorrell was created by California National Productions.
In its final days, the series just managed to coincide with the centennial of the Pony Express (April 3, 1860).
[3] The series featured two recurring roles: Grant Sullivan as Brett Clark, a roving investigator for the company, and Don Dorrell as Donovan, a young Pony Express rider.
The majority of the weekly episodes involved Clark and Donovan solving various Pony Express mysteries.
[4] Pony Express was filmed at Iverson Movie Ranch in Chatsworth in Los Angeles County, California.