Emori docks her boat with Otan and leads Murphy, Jaha, and their companion into the wilderness in episode 3x02 "Wanheda: Part 2".
Oliver attempts to rescue Yao Fei from the camp in episode 1x14 "The Odyssey".
Penny finds his magic is on the fritz and decides to head back to talk with the man by the stream again and Quentin talks to Alice about facing the Beast in episode 2x01 "Knight of Crowns".
Source: Chris Fisher — Instagram, 2, 3, 4, 5
From episode 4x20 "Worlds Apart".
Amanda and Vogle land in the water on a strange world in episode 2x04 "The House Within a House".
Young Tak and Rei watch their father destroy their mother's body after murdering her in episode 1x07 "Nora Inu".