Well, I guess it had to happen for Class, just as it has happened for all the Doctor Who spin-offs. The "fan service" episode which wallows in memories of a beloved historical episode. In this case the historical episode in question is the 7th Doctor and Ace TV story "Remembrance of the Daleks". That's not really a spoiler given the title of this one, though. To add extra nostalgic gooeyness, that TV episode was itself a  chunk of fan-service, bringing back the Daleks and the iconic Coal Hill School setting of the very first episode. Given that Class is set in a twenty-first century version of that same school, the connection was pretty inevitable.

Having said all that, this episode is not done too badly. Wisely they chose not to involve any of the Doctors. I think that would have overshadowed the joy of the story, which is the interaction between Dorothy "Ace" McShane and Miss Quill. They are similar in so many ways, but with very different attitudes, and their bickering is great fun. Sure, there's some stuff for Charlie to do while Ace and Quill stomp around the school disagreeing with each other, and a few 'meeting out of order' gags, but it all feels like it's only there to give Quill and Ace a reason to meet.

If you're a Nick Briggs fan then you get plenty of him in this story. He does the Daleks, obviously, but also has a slightly cringey turn as a baffled soldier. That soldier does get to give Charlie a clip round the ear for being smug and entitled. though, something I reckon many in the audience will think was long overdue ;)

In summary, one of the best of this run of Class audio stories so far, which doesn't take itself too seriously and leans in to the nostalgia.