Jason O'Mara Jim Shannon Actor Stephen Lang Cmdr. Nathaniel Taylor Actor Shelley Conn Elisabeth Shannon Actor Landon Liboiron Josh Shannon Actor Naomi Scott Maddy Shannon Actor Alana Mansour Zoe Shannon Actor Allison Miller Skye Actor Christine Adams Mira Actor Rod Hallett Dr. Malcolm Wallace Actor Simone Kessell Guest Star Dean Geyer Guest Star Damian Walshe-Howling Guest Star Damien Garvey Guest Star Terrence Mullings Guest Star Emelia Burns Guest Star Matthew Scully Guest Star Morgan Davies Guest Star Peter Lamb Guest Star Steven Spielberg Executive Producer Peter Chernin Executive Producer René Echevarria Executive Producer Brannon Braga Executive Producer Jon Cassar Executive Producer Aaron Kaplan Executive Producer Katherine Pope Executive Producer Justin Falvey Executive Producer Darryl Frank Executive Producer Craig Silverstein Executive Producer Kelly Marcel Executive Producer