Dick and the Rider are working for the Pony Express as the stage lines are taking over the work. Rider decides to go with progress and joins with stage owner Benton while Dick stays with Ryan who runs the pony service causing a rift between our heroes. However a horse trader , Logan,secretly covets the post office contract and attempts to sabotage both operations. Frantic chases ,bone -crunching fistfights ,mass shootouts ,out door locations and spectacular stunt work, especially from the series stars ,Jock Mahoney and Dick Jones,as well as regular stuntmen Al Wyatt,Boyd Stockman and Bob Woodward ,make this series the most 'western ' of western series. The regular use of character actors in different roles is also fun to see. Alan Hale Jr. Makes his fourth of five appearances as a henchman here ,Leonard Penn also had five roles ,William Fawcett appeared nine times over the run of the series , Stanley Andrews had seventeen roles and Kenne Duncan also appeared nine times.