Mr Flatley is excited when he gets a letter saying that his Great Aunt Jemima has left him a million pounds in her will. Of course, all the students of St. Hope's immediately try to get into Flatley's good books, hoping to get a share of the money. While Flatley is celebrating however he receives a ransom note threatening to blow up the school unless he turns down his share of the money and warning him not to go to the police. The note is taken to HQ where Frank discovers traces of Dugranite on it, a rare but powerful explosive - finding this, they know that whoever sent the note is serious - there is a bomb in the school and Rose finds a DNA sample on the envelope. They are also alarmed to discover that the last delivery of Dugranite was six weeks ago - to SKUL. Flatley is in a state of panic but Frank assures him he will find the bomb and defuse it. Mrs King does not know about the bomb so is annoyed when Flatley tells her, "Frank is my new best friend". Frank then gives Oscar, Carrie and Rose a task: Flatley's other three relatives will be arriving for the reading of the will in Flatley's office and they are to get a sample of DNA from them to compare with that of the bomber - presumably one of them is the bomber and working for SKUL. The other relatives are Jeannette, a posh vicar who's young people's drop-in centre is in danger of closure due to lack of funding, Nozzy, a failing rock star, and Hamish, a Scottish university Chemistry lecturer. However when they compare all three DNA samples, none of them match the bomber's. They are forced to conclude that this means the bomber is someone else, and they continue searching. Rose, however, examines the note and notices that to prevent handwriting analysis, the letters have been cut out of an American newspaper. She does some more research and discovers that one of the relatives, Dwayne, is living in America. He has a certain fondness for kittens and blew up his house in an experiment involving Dugranite! He (thetvdb.com)