Brave-ish heart, the fifth episode of the latest doctor who spin off, class, and after it's innitial BBCiplayer viewing, it has now moved to BBC one at a late night viewing.
You can see episode one on Iplayer at 10.45PM.
So then, the new spin off show comes to the proper channel in proper viewing. Recommend for you to watch it if you have not. May contain some material unsuitable for younger viewers.