He has also appeared in episodes of Santa Barbara, Thunder Alley, 3rd Rock from the Sun, The Young and the Restless, The Trouble with Normal, Days of Our Lives, Deadwood, Day Break, Big Love, and John from Cincinnati. He also played the Sheriff in drama Harper's Island.
Other roles Jim played in Supernatural include: An unnamed demon who possessed Bobby Singer in Season 5, an unnamed khan worm possessed Bobby in Season 6, and an unnamed Soul Eater who also possessed Bobby in Season 11, and an alternative reality version of Bobby in Seasons 12, 13, 14 and 15.
- Jim originally did not believe "new guy" Misha Collins could beat his episode count. When Misha did just that, Jim lamented how "the mighty have fallen".
- Jim once made a joke that his tombstone would mention his kiss with Mark Sheppard.
- Around the time "The Future" aired, Jim Beaver tweeted to Andrew Dabb that he was sad he couldn't appear in Season 12 and hoped to appear in and early episode of Season 13. When the Season 12 finale aired, it was revealed that Jim had been lying, as Bobby Singer did get an appearance.
- Jim believed Bobby held respect for John as a hunter, but not as a father.
- Jim is one of two Supernatural actors to appear on the critically acclaimed AMC Drama Breaking Bad, the other being DJ Qualls. Jim later plays the same role in the show's spin-off prequel Better Call Saul.
- Jim is the only cast member aside from Jensen Ackles and Jared Padalecki to appear in every season.