a beekeeper in “Delta and the bannermen”
Goronwy! Moffat endorsed the fan theory that he's a future Doctor in retirement like the Curator. Honestly, this is why I happen to actually like the bigeneration - the idea that the Doctor would ever just retire and leave the universe to sort itself out while he collects art and beekeeps used to bother me, but if he himself is still out there running around, then it becomes delightful and sweet.
I'm more excited for this episode than I have been for any episode this series. Inua Ellams is awesome and a perfect fit for Doctor Who.