- Country: UK
- Genres: Animation, Family
- Release: 2013-01-15
- Director: Greg Tiernan , John Gilluley
- Writers: Max Allen , Andy Bernhardt , Gerard Foster
- Language: N/A
- Stars: Michael Angelis , Michael Brandon , Michael Brandon , Ben Forster , David Bedella , David Bedella , Jules de Jongh , Jules de Jongh , Jules de Jongh , Teresa Gallagher , Teresa Gallagher , Teresa Gallagher , William Hope , William Hope , William Hope , Steven Kynman , Kerry Shale , Kerry Shale , Kerry Shale , Martin Sherman
- Runtime: 58 min
- Awards: N/A
- AKA: Thomas & Friends: Muddy Matters , Thomas & Friends: Muddy Matters (United States of America) , Thomas & Friends: Muddy Matters (United Kingdom)
- Plot: Through mud, garbage, and muck, Thomas and his engine friends show that being really Useful can be a dirty job! See James turn into the Really Muddy Engine, and Thomas get showered with rubbish. Watch Peter Sam make a big mess trying to keep things on track, as Thomas creates chaos with the crows and much, much more. Join Thomas and the Steam Team as they make the best of the mess in these exciting muddy and mucky adventures! Episodes include: Muddy Matters, Thomas and the Rubbish Train (retitled Thomas and the Garbage Train in the US), Don't Bother Victor!, Whiff's Wish and Thomas Toots the Crows.
- IMDB:tt2591720
Thomas & Friends: Muddy Matters Cast · · · ALL
Michael Brandon
Narrator (voice)
Martin Sherman
Thomas / Percy (voice)
Kerry Shale
Gordon / James / Sir Topham Hatt / Mr. Percival / The Photographer (voice)
William Hope
Edward / Whiff / Rocky / Farmer McColl (voice)
Jules de Jongh
Emily / Mavis / The Duchess of Boxford (voice)
Steven Kynman
Peter Sam (voice)
Keith Wickham
Den / Skarloey / Sir Handel (voice)
Glenn Wrage
Spencer (voice)
Ben Small
Rheneas (voice)