Blake & Mortimer - Volume 29 - Eight Hours in Berlin

1963\. As Professor Mortimer is invited to the USSR by an old archaeologist
friend to join in the search for the lost city of Arkaim in the Urals, Captain
Blake goes to Switzerland for an important conference between the intelligence
services of the Western Powers, in order to prepare for the top-secret
Operation Prince in Berlin. Berlin where a West German agent was just shot
trying to cross the Wall back from East Germany, uttering a single word before
dying: doppelgänger …