Main Characters Skye Alexandria Tate 13 main appearances James "Jim" Shannon 12 main appearances Dr. Elisabeth Shannon 12 main appearances Mira 12 main appearances Josh Shannon 12 main appearances Maddy Shannon 12 main appearances Zoe Shannon 12 main appearances Commander Nathaniel Taylor 12 main appearances Dr. Malcolm Wallace 11 main appearances
Recurring Guest Characters Lt. Alicia Washington 11 guest appearances Mark Reynolds 11 guest appearances Tom Boylan 9 guest appearances Carter 7 guest appearances Reilly 6 guest appearances Casey Durwin 5 guest appearances Dunham 5 guest appearances Hunter 4 guest appearances Curran 4 guest appearances Lucas Taylor 5 guest appearances Kara 3 guest appearances Sixer Runner 3 guest appearances Deborah 3 guest appearances Max 2 guest appearances Bracco 2 guest appearances Robert Stanley 2 guest appearances Tower Guard 2 guest appearances Brady 2 guest appearances Leah Marcos 2 guest appearances Sam 2 guest appearances ⇤ « 1 2 3 4 » ⇥