This is the favorite episode of many Wagon Train fans. I have seen it several times and am watching it right now MeTV. John Ford directed this one and The Duke himself, John Wayne, appears at the end in darkened silhouette, as General Sherman. He is billed as Michael Morris. Robert Horton isn't in it at all, except for being mentioned. Gill,Hawks handles the scouting duties. Major Adams doesn't wear his usual outfit, but is instead seen in the one he wore in Wagonmaster (1950j. Maybe Ford used some footage from that film in the episode.
The story concerns an alcoholic doctor and wife joining the train after their wagon breaks down. The doctor, Colter Craven, has lost his confidence and the Major has to convince him to treat a woman experiencing a very difficult childbirth. He does so by relating the story of how his old friend, Sam Grant, overcame problems with alcohol to become president of the United States. That's all done in flashback.
Most of the John Ford stock company appears in The Colter Craven Story. Anna Lee, Carlton Young, Willis Bouchey, John Carradine, Jack Pennick, Ken Curtis, Chuck Hayward, and Hank Worden (uncredited) are all on hand. Paul Birch handles the role of Ulysses S. Grant perfectly. He stands out in a truly outstanding cast.
This is one of the best western TV series episodes ever made. Be sure to watch it whenever you can.