When Bryan and Finola investigate a mysterious, otherworldly square that has appeared in a field, they come to understand new revelations about our planet. Maddox meets with an old contact.

When Bryan and Finola investigate a mysterious, otherworldly square that has appeared in a field, they come to understand new revelations about our planet. Maddox meets with an old contact.

Black Siren returns to give Chase help; Felicity plans a birthday party for Oliver; Lance is angry with Rene for missing the custody hearing about his daughter.