1/4 The Keeper of Traken is nearing the end of his long reign and requests the Doctor's help.
4/4 Rorvik ignores the Doctor's warnings and takes a gamble which may have fatal consequences.
3/4 As the void shrinks, Rorvik plans to take desperate measures to escape via the mirror.
2/4 When Rorvik learns that Romana is a time sensitive, he takes her prisoner.
1/4 The TARDIS is drawn into an empty void but they are not the only ones trapped there.