After Pete Duel's suicide, it was decided that the episode then being filmed would not be shelved until a replacement for Duel could be cast and re-takes filmed. Voice actor Paul Frees was brought in to dub in Duel's voice for some completed outdoor footage whose audio tracks were felt to be of unsatisfactory quality.
Jed 'Kid' Curry:
Heyes, there's only one thing been keepin' you alive all this time.
Hannibal Heyes: And what's that?
Jed 'Kid' Curry: Me.
During the entire show, Heyes and Curry have either one pair of saddlebags each, or nothing at all, yet they continually appear in different recurring outfits, including heavy coats, suits (with matching hats), and different vest/jacket combinations.