Even a Time Lord can't change the past.
A wasteland. A dead world... No, there is a biodome, rising from the
ash. Here, life teems and flourishes, with strange and lush plants, and
many-winged insects with bright carapaces - and one solitary sentient
creature, who spends its days watering the plants, talking to the
insects, and tending this lonely garden. This is Inyit, the Last of the
Kotturuh.
In All Flesh is Grass we are transported back to The Dark Times. The
Tenth Doctor has sworn to stop the Kotturuh, ending Death and bringing
Life to the universe. But his plan is unravelling - instead of bringing
Life, nothing has changed and all around him people are dying. Death is
everywhere. Now he must confront his former selves - one in league with
their greatest nemesis and the other manning a ship of the undead...