Grace finds Trevor meditating on the beach and convinces him to give some other solution a try. Later, Kat brings Grant to look over the water and tests his memory about that location in episode 3x07 "Trevor". Grant returns to the moment his host met Kat and advises her to give her current boyfriend another shot in episode 3x10 "Protocol Omega".
Marcy attends James Edward Bailey's funeral to give support to David who is giving the eulogy for his former client in episode 3x07 "Trevor".
Geppetto wakes up on the beach and finds Pinocchio turned back to wood in episode 1x20 "The Stranger".
August Booth takes Emma to the store where he took her when they were children. Filmed at the concession stand in the parking lot. in episode 1x20 "The Stranger".
Oliver is rescued by a pair of fishermen from a remote island in pilot episode. Years ago Oliver lands on the beach after being shipwrecked in episode 1x02 "Honor Thy Father". Oliver returns to the island again to Thea to train her in episode 3x13 "Canaries". Appears in 4 more episodes.
Syd and her team help David escape where he is being held and they escort him down to the beach where he meets Melanie Bird in episode 1x01 "Chapter 1".
Ryn jumps into the water and later she returns with Eliza to convince her that Ben & Maddie can be trusted in episode 2x12 "Serenity". Ryn returns with another mermaid and later Eliza comes ashore with the Hunter in episode 2x14 "The Last Mermaid". Ryn orders the male mermaid to stay behind as she sends Eliza and the hunter back out to sea in episode 2x15 "Sacrifice". Appears in 1 more episode.