Episode Title:The Empty Book.Episode Description:Kara is imprisoned in a mysterious jellyfish by the aquatic Mortigarians. She is being tortured in response to them finding out what happened to Kali. Searching for Kara, Mel speaks of Kali in the past tense as if she no longer exists. The Defenders arrive to free her (Adam and Erik are wearing breather masks while the others breathe thanks to their guardians merging)...