Blake and Mortimer

Season 1, Episode 2: The Yellow Mark

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A mysterious creature threatens the peace of London. It sees in the dark, isn't wounded by bullets, and wherever it goes, a yellow μ Greek pops up. Scientists kidnapped, Crown jewels stolen..... Only Blake and Mortimer can stop Dr. Septimus' vengeance. They discover that the mysterious creature is none other than Olrik, hypnotized!