S21E02: A Most Singular Engine

Diesel makes mischief between Daisy and Harvey by telling them both that the other is boasting of being unique. However, the two become friends while assisting each other on a job, and Diesel does not understand why.

Season 21

Teresa Gallagher
Teresa Gallagher
Emily (voice)
Nigel Pilkington
Nigel Pilkington
Percy (voice)
Rachael Louise Miller
Rachael Louise Miller
Rebecca (voice)
Rob Rackstraw
Rob Rackstraw
James (voice)
Joseph May
Joseph May
Thomas (voice)