If you’ve enjoyed the first three episodes of Doctor Who spin-off Class, then we have some good news – because according to series creator Patrick Ness, this week’s episode kicks off the biggest story yet.

Talking to fans on his Twitter account, Ness revealed that this Saturday’s story “Co-owner of a Lonely Heart” was more than just any ordinary episode, adding that some “shocks” were in store for Class’ first double edition.

We love two-part Doctor Who episodes here at RadioTimes.com (we even wrote all about it once), so frankly we’re pretty excited to see what Ness has come up with for the spin-off. Who knew double school periods could be such fun? 

Class is currently airing on BBC America