Nice to have a sequel to a previous story. The return of the Yeti, Travers and the Great Intelligence are all good. As a fan of continuity, it's also nice to have the introduction of Brigadier Lethbridge-Stewart, who of course we will see features heavily with the third Doctor and have run ins with more incarnations. This story can be slow at times in the earlier episodes but still enjoyable. Interestingly they used the Cybermen theme tune from their previous two stories in the battle between the Yeti and the soldiers.