Series 13, possibly the golden era of classic Doctor Who, talk about classics, Zygons, Pyramids, Morbius etc, my standout serial though is definitely Android Invasion. Episode 1 is fantastic, intriguing, fast paced, atmospheric. A Terry Nation script, no Daleks, but plenty of intrigue, the pods, the guards, the soldier going over the top, there is so much going on here to keep you interested. Tom and Liz are at the height of their brilliance, every scene between them looks so easy and natural. The Devesham setting, which is really East Hagbourne in Oxfordshire, is well worth a visit, a stunning place, it really helps add atmosphere, as does the creepy music. I'm stunned how many people pick on Android Invasion, but I would like to point out in terms of viewing figures Android Invasion beat the lot in this season, episode 3 got over 12 million, it really is that good. One of the best scenes has to be in the pub, where the Doctor and Sarah are investigating, the locals turn up and behave very oddly. A brilliant serial opener. 10/10