milkshake! Gold's DVD has been out for sometime in the UK with the Thomas & Friends episode included in it revealed.
The episode comes from 2010's, The Lion of Sodor of the Thirteenth Series and the second in it's season.
The notable word of Gold can refer to the golden Lion of Sodor statue that Thomas is enlisted to deliver to Knapford Station in the above mentioned episode.
milkshake! Gold is available now on UK DVD shelves.