Imagine an alien with three hearts and ten arms growing out of its head.
In an instant, it could become invisible, or switch on the most electrifying light shows ever seen.

This alien actually exists; Cuttlefish are one of the strangest animals on our planet. Leading expert Dr. Mark Norman reveals how these shape-shifting champions can hypnotize their prey, impersonate the other sex, and even turn out to be deadly - this documentary reveals the spectacular pyrotechnics of these alien creatures. Discover what goes on between their eyes and what they can teach us about our own brainpower.