Slaney and Hearn face each other for the last time in Mexico
An escape at Arkham. Mad Hatter tricks. Barbara's post-Ra's al Ghul effects.
One hard night in Gotham.
Ben tries to help Ryn, but the mermaid is only concerned with finding her sister again.
Bristol Cove - a town already obsessed with mermaids - is thrown into disarray after a mysterious young woman turns up.
Hap and Leonard discover some scary things after finding Florida's car in the woods.
Eddie plans to reveal the truth about Dr. Steve Meyer to the movement. Cal prepares to do something dangerous and drastic.
Something appears on the ice when a crew scouts out leads. Hickey and Gibson are caught breaking rules. Crozier and Franklin butt heads.