Endless Winter" chapter four! The icy tendrils of Frost King's global grip extend all the way to the bottom of the Seven Seas! Can Arthur and Mera convince a ferocious collective of Fire Trolls to emerge from the Earth's very core to save Atlantis from its frozen imprisonment? And in our look to the past* the unlikely team of heroes gets more than they bargained for when they face off against the Frost King for the very first time!