Alien Species
Mentors

The Mentors are an evolved form of amphibian native to Thoros Beta. They have no mobility on land, although it is possible they may be mobile in water. They need watering continually, and must be carried by pall bearers when on land.

Two things drive the Mentors of Thoros Beta: Money and Power. The Doctor and Peri enountered Sil on the planet of Varos. Sil was acting as negotiator for the Mentor run Galatron Mining Corporation. He was trying to buy the Zeiton-7 ore from the Varosians at a cheap price, practically bankrupting them. This would then lead to the occupation of the planet.

The Doctor delayed the plans to the point where the Zeiton-7 was needed urgently, and Sil was ordered to pay any price.

The Doctor and Peri later enountered Sil and the Mentors on Thoros Beta where the future of the leader, Kiv, hung in the balance. Kiv's brain had grown to a point where his skull could not contain it. This would spell disaster for the Mentors' profits.

Crozier, a scientist funded by the Mentors, was in charge of transplanting Kiv's brain into another host. The Doctor was found to be unsuitable, but Peri was found to be perfect. Crozier took the decision to operate on Peri.

There are conflicting reports of what happened. One version of events is that the experiment was a success and Peri's mind was replaced by the mind of Kiv. This would have had a far reaching consequence. When Peri's body aged, or was damamged, Kiv could be transplanted again. For this reason the Time Lords used King Ycarnos as an assassain to kill Peri/Kiv.

Another version is that the experiment never took place, and Peri became a Queen living alongside King Ycarnos, and Kiv's condition presumably worsened causing his termination.

Television adventures featuring the Mentors:

Vengeance on Varos
Trial of a Time Lord (Mindwarp)

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