One of my favourite Hartnell stories.
Ian and Barbara have gone, and someone has trespassed onto the TARDIS, it's Stephen, who's stowed away and joins the TARDIS crew. The TARDIS lands on rocks overlooking the sea, it's arrival is witnessed by a Monk. The Monk listens in to the Doctor's explanations about the TARDIS and doesn't seem phased, he's a suspicious character. The locals look pretty savage, but the Doctor is very warmly welcomed by one of the women folk, where he learns of Vikings, and that it's 1066! Something's up at the Monestary as the singing suddenly takes a sharp dip, so the Doctor sets off to investigate, all is not as he was expecting......
I love the humour, Hartnell's at his funniest, in answer to Stephen's disbelief his response is hilarious, 'that is the dematerialing control, and that over yonda is the Horizontal hold, up there is the scanner, those are the doors, that is a chair with a Panda on it, sheer poetry dear boy.' So sarcastic, but brilliantly delivered lines.
Hartnell is absolutely glorious throughout this story, of those that exist it's probably my favourite of his performances, you can see he's totally loving what he's doing.
This is a fabulous opening episode, Stephen's proved to be a great addition, making up for the loss of Ian and Barbara. The Monk is a fascinating character. It's a real joy. 10/10