Crowds of people walking through London under alien influence: Semi-check; Clyde's Dad left a crowd of people under alien influence, but they weren't going anywhere.
Tie-in with Doctor Who story: Check-- "hey Dad, hack into UNIT!"
Girl protagonist's mum is annoying: Still a non-check; they must be giving her a rest this fortnight.
Mobile phone as plot device: Check. Clyde's refusing to answer his friends calls (and puzzlement at their names in his phone book), Maria downloading data to Rani and Luke via mobile, Sarah Jane having her mobile switched off meaning that she can't come to the rescue, etc.
Luke says something so daft that you have to wonder how he gets through life without being mercilessly bullied: Non-check for once.
Sonic lipstick: Check, briefly.
Wristwatch scanner: Non-check.
One or more of Sarah's companions falling under alien influence: Serious check. We're pretty much batting 100 on this one this season.
Alan points out: UNIT couldn't have existed in the 1940s, as it was originally at least a UN organisation. Unless there's some historical revisionism going on in Cardiff. Or maybe it was the League of Nations Intelligence Taskforce instead?