Main Characters
Alec Mercer
29 main appearances
Marisa Clark
29 main appearances
Kylie Mercer
29 main appearances
Phoebe Duncan
29 main appearances
Recurring Guest Characters
Mountaineer
1 guest appearances
Victoria
1 guest appearances
Reed Moy
1 guest appearances
Ben Delano
1 guest appearances
Shel Benson
1 guest appearances
Selena Cooper
1 guest appearances
Bill Nye
1 guest appearances
Andre Thianapolis
1 guest appearances
Natalia Petrova
1 guest appearances
Vladislav Sokolov
1 guest appearances
Station Astronaut
1 guest appearances
Student
1 guest appearances
NASA Tech
1 guest appearances
Flight Director
1 guest appearances
Bo
1 guest appearances
Detective Serrano
1 guest appearances
Sameer Kumar
1 guest appearances
Portia Moranis
1 guest appearances
Viola Salonga
1 guest appearances