Crowds of people walking through London under alien influence: Well, four people walking through "Danemouth" under alien influence. Did the casting department suffer a budget cut this year, or what?
Tie-in with Doctor Who story: Flashbacks to the Pertwee and Baker eras, plus "Journey's End" (shudder), and a big naff-off repeated reminder that next week's ep is a crossover guest starring David Tennant.
Rani's Mum is annoying: Rani's Mum is absent, actually. But Grandma Rani with her gratuitous name-dropping in the final flashforward more than makes up for it.
Star Wars reference: No.
Mobile phone as plot device: Check; Rani punishing her friends by not answering her phone, plus Clive's showing off his mobile camera (how 2004) at the end.
Luke says something so daft that you have to wonder how he gets through life without being mercilessly bullied: Not really, though dialogue in episode one indicates that Clive's been trying to train this tendency out of him.
K9 interprets a figurative English expression literally: His "Cheese!" interpretation is practically the second thing he says, setting us up for much more to come.
Sonic lipstick: Check. "Who needs the sonic lipstic?" Rani asks. The writing team, evidently.
Wristwatch scanner: Briefly in episode 1, to scan the derelicts on the fairground rides.
One or more of Sarah's companions falling under alien influence: Check. Love the red-eye effect.
Sarah and/or companion(s) acts like a selfish cow: Rani's friends are a little offhand with her, and suddenly she's off to the coast without telling them and not answering their calls? What a diva.
On a side, unrelated point, I did absolutely love that last week's epsiode of "Dollhouse" featured Karl "Helo" Agathon and Lee "Apollo" Adama kicking the crap out of each other. Hooray for casting cross-pollination.