I really liked this. The Doctor, Ian and Barbara really feel like they have started to hit their stride. I love how Ian and Barbara tease The Doctor "getting old". This is my introduction to Vicki and she is a real joy, I liked her conflict between Barbara. I also liked Barbs and Ian explaining they are from 1963 to Vicki. The mystery with Bennett and Koquillion is interesting too. Vicki walking into the TARDIS is as classic as it gets, nothing better than an "its bigger on the inside".

Fun cliffhanger too!