Inside the TARDIS, the Doctor and Martha are trying to decide where to go next. "Right, tell you what" the Docor said. "Give me two numbers". "Hang on" Martha replied. "The last time I gave you some numbers we ended up facing that Balthasar and going on a search for The Infinite!" "Yep" the Doctor replied, grinning wildly. Martha sighed. "22, 46, 98, 22, 67 and 53". The Doctor typed the numbers in quickly and pressed buttons. The TARDIS sprung into life, the central columnrising and falling rapidly. "Ah, that may be a problem".