Classic Doctor Who: Trial of a Time Lord

Placed on trial by his peers, the Doctor is forced to watch events from his past, beginning with an incident on Ravolox involving the curiously named Marb Arch.

The Doctor has an appointment with the Immortal, while Peri finds herself caught up with Glitz and the Tribe of the Free and Merdeen begins to question all he believes.

With the black light converter destroyed, the Doctor fears for the planet's safety and needs to find the Secrets of the Sleepers and discover why they are there in the first place.

The Doctor is foxed by Drathro's logic so it takes Glitz's blunt lies to buy them some time until Ravolox can be saved. Meanwhile, the Tribe makes a foolhardy attack on Marb Arch.

The next story the Valeyard shows the Doctor sees TARDIS arrives on Thoros-Beta, homeworld of the Mentors and the Doctor and Peri's old foe.

The scientist Crozier keeps making promises he can't keep to Kiv, and Yrcanos and Peri are betrayed by the addled Doctor, although he is sure the Matrix is being manipulated...