Model series ranked.
1: The Great Discovery.
2: Season 7.
3: Season 4.
4: Season 3.
5: Season 5.
6: Season 1.
7: Season 2.
8:: Thomas and the Magic Railroad.
9: Season 11.
10: Season 9.
11: Season 8.
12: Season 6.
13: Calling All Engines.
14: Season 10.
15: Season 12.
1: The Great Discovery.
2: Season 7.
3: Season 4.
4: Season 3.
5: Season 5.
6: Season 1.
7: Season 2.
8:: Thomas and the Magic Railroad.
9: Season 11.
10: Season 9.
11: Season 8.
12: Season 6.
13: Calling All Engines.
14: Season 10.
15: Season 12.