"Farmead Menace - Part One" is the 639th episode of Casualty and the 1st episode and series premiere of the 23rd series.
On the Farmead Estate, teenager Sammy Malone is causing havoc with some fireworks, with disastrous consequences. With a film crew in tow, Jeff, Dixie and Adam arrive at the scene and start to treat an injured resident. The site soon becomes unstable as the repercussions continue. Unbeknown to any of them, the rocket has caused a fire, which in turn causes an explosion. Soon the fire is out of control. Tess decides to track down the culprit herself, which puts her life in grave danger.