DigitalSpy!

DigitalSpy have released some statements about Parts 1 and 2 of series 2, episode 1 of the Sarah Jane Adventures, The Last Sontaran. There is one red herring.
NOTE: I have included my thoughts on each statement.

Sarah Jane uses her sonic lipstick on a Sontaran ship. This is likely to be true from what we saw in the trailer.

Clyde and Luke use Mr. Smith for computer games. This is definitley true, with the Radio Times talking about it.

The Rutans pop up during the episode. This isn't likely.

Sarah Jane speaks to old friend Sir Alastair on the phone to find out a vital piece of information. It is unlikely this is true as Sarah and the Brig bump into each other in the finale. It could equally be true, as a sort of lead up to the finale.

A Sontaran is accused of being a fan of the Arnold Schwarzenegger Conan movie franchise. This is possible.

A Predator-style cloaking device is deployed in Goblin's Copse. Again, this is possible.

Maria's dad Alan receives a very important letter. It is very likely this is true, becuase Alan is asked to start a new job, leading to him and Maria leaving the show.

Here are the spoilers for Part 2. Again, there is one red herring.
NOTE: The red herring is the second, as it has been confirmed Alan and Maria leave for a new house. It has also been confirmed that Chrissy will stay in the town, but not appear in the show.

Sarah Jane is shot.

One of Maria's parents doesn't survive the episode.

Luke has a gas problem.

Chrissy meets Mr. Smith.

A Sleeper Agent is on the loose.

Law Three of Sontaran Battle: Always have a Plan B.

A Sontaran's stumpy fingers are used to thwart the alien invader.