Back up to: Season 18
4/4 The Doctor must prevent Meglos from using the dodecahedron to destroy Tigella.
3/4 Meglos escapes with the Dodecahedron and the Doctor is mistakenly held responsible.
2/4 Posing as the Doctor, Meglos penetrates the underground city of Tigella.
1/4 Meglos plans to steal the ancient and powerful Dodecahedron from Tigella.