It's a landmark episode for Time Ram, as we take the Fourteenth Doctor David Tennant's 'The Star Beast' and reinvent it for (checks notes) the First Doctor William Hartnell. And since it's a first story, that makes it THE first story. Who is the mysterious old man watching unearthly teenager Susan Foreman? Is he in league with the crab-like creatures hunting Susan's fluffy new pet? You probably know the answer if you've been paying attention for the last 63 years.