The Doctor and Rose are investigating strange things afoot at a school (near a UFO sighting, no less). New headmaster, new staff, new amazing achievements amongst the student body! And, apparently, a new brand of chips being served in the lunch room. What’s behind all this strangeness? Could it be a certain Watcher from a completely different TV series?! Well, Sarah Jane is on the case and The Doctor, Rose, and two tin dogs are along for the ride! It’s a School Reunion!