Acting
- 2022Star Trek: Strange New WorldsJag Defender1 ep.
- 2019Living with VolcanoesSelf4 ep.
- 2015Planet Oil: The Treasure That Conquered the WorldSelf - Presenter3 ep.
- 2013Rise of the ContinentsSelf - Presenter4 ep.
- 2012Volcano LivePresenter4 ep.
- 2012How to Grow a PlanetHimself - Presenter3 ep.
- 2010Men of RockSelf - Presenter3 ep.
- 2010Making Scotland's LandscapeHimself - Presenter5 ep.
- 2010How Earth Made UsSelf - Presenter5 ep.
- 2008Earth: The Climate WarsHimself - Presenter3 ep.
- 200810 Things You Didn't Know About...Self - Presenter4 ep.
- 2007Earth: The Power of the PlanetSelf - Presenter5 ep.
- 2006Journeys into the Ring of FireHimself - Presenter4 ep.
- 2004Journeys from the Centre of the EarthHimself - Presenter6 ep.
- 2004Naked ScienceHimself - Geologist1 ep.
- 2000Rough Science34 ep.
- 1978HuntingtowerNapoleon6 ep.
- 1964HorizonSelf - Presenter2 ep.
Guest appearances
- 2023Star Trek: Strange New WorldsJag Defender1 ep.
- 2013HorizonSelf - Presenter3 ep.
- —Naked ScienceHimself - Geologist1 ep.
Also known as: Dr Iain Stewart · Dr. Iain Stewart · Prof Iain Stewart · Professor Iain Stewart