At the Sodor Summer Party, Thomas has two jobs to do: collect milk to make ice-cream and to collect butter from the far side of the Island to make cakes. When he doesn't pay attention, Thomas goes too fast and turns the milk half-way to butter. Can he find a way around a dairy disaster and make the summer party a sweet success? Spotless Record Arthur arrives on the Island of Sodor and is put to work with Thomas and Percy. But when Thomas hears that Arthur has never been in trouble, he is a bit jealous and decides to play a trick on him. Thomas' trick makes Arthur crash and spill his load. Is Arthur's spotless record ruined or will Thomas own up to his tricks on the track? Mighty Mac An unusual new engine with two boilers - Mighty and Mac - starts work on Sodor. The Thin Controller gives Mighty and Mac a special job, but they have never had to work together before! They puff backwards and forward until soon they are very confused and take the wrong route. Can they learn that they must work together to be a really useful engine?
