When Zoo's second season kicks off Tuesday (9/8c, CBS), the animal takeover has already entered Phase 2. It doesn't take our heroes long to discover that the animals are not only launching coordinated attacks on humans themselves, but are also using more subversive tactics to destroy civilization and make the planet uninhabitable.

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But believe it or not, there's actually a bigger problem. The team quickly realizes that the threat is much, shall we say, closer than they initially assumed - and one of their own may be in immediate danger. (And no, we're not even talking about Jamie.) After all, what could be worse than groups of animals with supernatural abilities and murderous tendencies? Think about it.

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