By Russell T. Davies
“It's not just any old power source. It's the Tardis. My Tardis. The best ship in the universe.”
The Doctor, Rose Jack and Mickey are enjoying a quiet time out in Cardiff while waiting for the TARDIS to refuel at the rift. Everything is going good until The Doctor notices the front page of the local newspaper. To his dismay he sees the face of a familiar foe thought to be dead when Downing Street exploded from a missile. Margaret the Slitheen is alive and to make matters worse she is the mayor of Cardiff.
So the four travelers head out to find Margaret and to stop her from building a nuclear power plant that would fail and blow up the city to allow her to escape using an extrapolator. But the thing is once they have her they need to wait before they take her back to Raxacoricofallapatorius they have to wait for the TARDIS to finish refueling and in that time anything could happen to allow Margaret to escape.
Boom Town will not go down in history as one of the greatest stories of all time but it will not be one of the worst. It is a fun episode that is light hearted and entertaining and really captures the heart and feel of the 9th Doctor era without getting bogged down in a complicated story. Ten years on it still works and as filler story it is one of the better ones in NuWho.