Enemy in the Dark (Perry Rhodan - English, #85)

Darker than they think

A robot dies and his death--because he was a governor in the Realm of Arkon--is the catalyst for an interstellar police action.

Enter the Finnmark, a spacer of the State Class, and its commander, Major Thomea Untcher. Together they and the crew set out for the water world, Opgham.

But en route to this alien planet, Untcher and his men are unexpectedly, dangerously, confronted by the--Enemy in the Dark