Temporada 4

1. Episodio 1

2. Trains, Submarines and Zeppelins: Part 2

3. Rollin' on The Riverboat Part 1

4. Rollin' on The Riverboat Part 2

5. Nest Swap

6. Episodio 6

7. Stop and Smell The Flowers

8. Moms' Campout

9. Episodio 9

10. Conductor's Sleepover

11. Junior Conductors Academy: Part One

12. Junior Conductors Academy: Part Two

13. Crystal and King Benefit Concert (1)

14. Episodio 14

15. Spooky Tree

16. Spinosaurus Super Model

17. What's at the Center of the Earth? (1): Layers

18. What's at the Center of the Earth? (2): Fossils

19. Episodio 19

20. Episodio 20