Albert Bassermann portrays Van Meer a dutch diplomat who has information wanted by foreign agents which leads to a complex, and interesting turn of events. Bassermann performance is a small simple one of an old man who just wants peace. He has the right quiet dignity in his first scene which work well for the film. After this scene though he is just always in a drug induced state. I suppose he is still fine if slightly odd, as just the drugged man. He even has a odd speech when drugged which he handles alright, but still it can't be that powerful since he still has to act drugged.
Bassermann gives fine performance which serves its purpose but little more than that. I was more impressed by other supporting players though. I particularly liked George Sanders who is quite good at playing a good guy for once, also good is Herbert Marshall as the more than meets the eye peace council leader, and even preferred Edmund Gwenn in a small but enjoyable role as a cockney assassin. Bassermann is not bad at all, I just feel he was not the best supporting player in the film.