Season 12
Episodes
1 Thomas and the Billboard Sep 1, 2008 
2 Steady Eddie Sep 2, 2008 
3 Rosie's Funfair Special Sep 3, 2008 
4 Mountain Marvel Sep 4, 2008 
5 Henry Gets It Wrong Sep 5, 2008 
6 Heave Ho Thomas! Sep 8, 2008 
7 Toby's Special Surprise Sep 9, 2008 
8 Excellent Emily Sep 10, 2008 
9 The Party Surprise Sep 11, 2008 
10 Saved You! Sep 12, 2008 
11 Duncan and the Hot Air Balloon Sep 15, 2008 
12 James Works It Out Sep 16, 2008 
13 Tram Trouble Sep 17, 2008 
14 Don't Go Back Sep 18, 2008 
15 Gordon Takes a Shortcut Sep 19, 2008 
16 The Man in the Hills Sep 22, 2008 
17 Thomas Puts the Brakes On Sep 23, 2008 
18 Percy and the Bandstand Sep 24, 2008 
19 Push Me, Pull You Sep 25, 2008 
20 Best Friends Sep 26, 2008