Guest Stars Curtis Lum as Calvin David Cubitt as Ted Pownall Sarah Jane Redmond as Elaine Pownall Sedale Threatt Jr. as Levi Aylya Marzolf as Katrina Brendan Fletcher as Rick Marzdan Natalee Linez as Nicole Martinez Luc Roderique as Ian Sutton Caroline Cave as Beth Marzdan Michael Rogers as Commander David Kyle Andrew Jenkins as Doug Pownall Daniel Cudmore as Bryan Co Starring Hannah Levien as Janine Georgia Waters as Eliza Millan Tesfazgi as Cami Hugo Ateo as Sarge Alvina August as Viv Marilyn Norry as Roberta Khaira Ledeyo as Dr. Park Edwin Perez as Researcher Olivia Poon as Mom Breanna Watkins as Emaciated Mermaid Naomi Tan as Little Girl