A slick movie director tricks a hayseed horse into becoming a stunt double.
Unfortunately the movie It's a Grand Old Nag is not yet available on HBO Max.
| Directing | Robert Clampett | Director |
| Writing | Michael Maltese | Writer |
| Crew | Sid Glenar | Cinematography |
| Visual Effects | Paul J. Smith | Animation |
| Visual Effects | Don Towsley | Animation |
| Production | Robert Clampett | Producer |
| Art | Curt Perkins | Background Designer |
| Writing | Tedd Pierce | Writer |
| Visual Effects | Ed Love | Animation |
| Sound | Jeff Alexander | Music |
