Guest Stars Curtis Lum as Calvin David Cubitt as Ted Pownall Millan Tesfazgi as Cami Georgia Waters as Eliza Aylya Marzolf as Katrina Brendan Fletcher as Rick Marzdan Katie Keough as Hunter (Mermaid) Deniz Akdeniz as Robb Wellens Caroline Cave as Beth Marzdan Co Starring Maria Meadows as Weakest Blue-Eyed Mermaid Lana Jalissa as Young Woman #1 Carl Montoya as Male Hybrid Patti Kim as Clerk Hyuma Frankowski as Purple-Eyed Soldier Merman #A Seigfred Perolino as Barista Ambika Vas as Waitress Stephanie Aigbe as Young Woman #2 Samantha Rose as Mother