S02E07: 'The Mark Of The Berserker' Part One

Kitchen sink drama collides with a supernatural object in this involving episode of Sarah Jane. Here are a few spoilers, plus one red herring.

A kid called Jacob goes crackers during a detention.

Graffiti artist Banksy is Clyde's inspiration.

Mr Smith is shut down.

Sarah Jane is confronted by The Trickster.

Rani picks up something dangerous from a toilet floor.

Luke has doubts over an impending sleepover.

Clyde's dad shows up - but can't remember his son's correct age.

Rani's father does an impression of Bianca from EastEnders.