The Last Sarah Jane Adventures Checklist: Serf's Up

Absence of Crowds of People Under Alien Influence: Actually, this time we get a crowd of aliens under people influence. Way to ring the changes!

Tie-in with Doctor Who story: None, but "Joseph Serf" was one of Patrick McGoohan's pseudonyms when writing The Prisoner.

Rani's Mum is Annoying/Is Absent: The latter, and for once not even mentioned in an anecdote.

Luke Cameo: Clearly this was intended as the mid-season Luke episode.

Sky says something so daft that you have to wonder how she gets through life without being mercilessly bullied: No, but then she's got to compete with Luke apparently having always called Clyde and Rani "Clani," even though that's never appeared before in the series.

Sarah Jane Waxes Maudlin: She goes on about family so much I suspect she's planning a US presidential campaign.

Mobile Phone as Plot Device: Luke actually makes a joke about the sheer number of mobiles destroyed in the service of the plots of this series.

Racism Towards Aliens: Yes, but, in a nice twist, not from the regulars this time.

The Crimes of Sarah Jane: Breaking and entering, deception, theft, destruction of property.

Sonic Lipstick: Versus magic alien pen.

Wristwatch Scanner: Yeah.

One or More of Sarah's Companions Falling Under Alien Influence: No, but you've got a whole crowd of hypnotised journalists.

Sarah And/Or Companion Acts like a Selfish Cow: The way she and her kids lord it over Clyde and Rani over getting to go to the big exclusive Serfboard launch, I'm amazed they're still friends.

Wide-Eyed Speech About the Wonders of the Universe and How Great it Is to be in Sarah's Gang: Copied from the first episode for obvious reasons.