Lethbridge-Stewart: Spheres of Influence

Cyrhaeddodd bod arallfydol y Ddaear, a danfonir Lethbridge-Stewart i ymchwilio. Rhaid iddo yntau alw ar y goreuon er mwyn sicrhau y bydd Prydain yn llwyddiannus yn ei thrafodaethau, gan fod unrhyw ddewis arall yn rhy ofnadwy i'w amgyffred ... bygythiad arallfydol - wedi cynghreirio â'r Undeb Sofietaidd! Nid yw methiant yn ddewis ... ar unrhyw gyfrif.
An alien presence has arrived on Earth. Lethbridge-Stewart has been dispatched to determine the nature of the new arrival. Lethbridge-Stewart must call upon the brightest and the best to ensure that Britain is successful in its negotiations, as the alternative is simply too terrifying for him to contemplate… an alien menace - allied to the Soviet Union! Failure is not an option. Not at any price