This serial had the obvious problem of the Doctor and Jo being captured and escaping way too many times. However, it was a lot of fun and the political intrigue was compelling. Jo is great in this one, specially in their escape from the Master's cell in the ship. Then she resists his hypnosis! And escapes using a spoon!!! It was part of the Master's plan, but still she one ups him by stealing the mind control thingy. I just really like Jo. And hey, the Master's back! Very good to see him again, and I love the twist when he shows up, and the twist that he's working for the Daleks (gasp!)

Some other minor comments: loved the look of the Draconians, loved the cliffhanger of having the Doctor call the Time Lords for help at the end (we know it's serious when he calls Gallifrey). They used the building of the Brazilian national congress as a stand in for the Earth Presidential Palace and wow, that was a huge surprise for me, as a Brazilian. It really is a very cool looking building.