Clearly inspired by John Buchan's The Thirty-nine Steps, this adventure sees Captain Blake on the run, accused of being a spy and a murderer, whilst Professor Mortimer pursues him across the north of England and into the Scottish Highlands in an attempt to aid and exonerate him.

Rather than one finger too few, as in the case of Hannay's nemesis, Blake and Mortimer must beware the man with six fingers!

When will Colonel Olrik learn not to stand so close behind Mortimer when covering him with a gun? It always ends with an elbow to the solar plexus and a right cross to the chin! Despite some predictable elements, the plot delivers some deft misdirections regarding the identity of the mole in the upper echelons of the intelligence service. ( )

Un scénario pas forcément très original, une histoire un peu courte, mais toujours le même plaisir de retrouver Blake & Mortimer, et leur ennemi de toujours, le colonel Olrik. ( )