Continuity mistake: When Clover accidentally steps into a black substance in the tunnel, she removes her right boot. However, when she and Sam are about to jump into the tunnel driller, her left boot is missing.
More mistakes in Totally Spies!
Clover: You won't believe the stunt Chris pulled this time!
Sam: Let me guess. He only called you eight times yesterday to say he loved you instead of the standard ten?