I love this project. I love Doctor Who and I love the Raspberry Pi. Combining the two is brilliant and I bet his son loves it.
My son wanted to try out the Dalek with the new Web interface. He seems to have figured it out with no problem. The drive components are not standing up to continued use so next year I will be upgrading it to use an old mobility scooter. You can see build pictures and more at Ostafichuk Raspberry Pi Projects