: Paul McGillion (Dr. Carson Beckett) and Mitch Pileggi (Colonel Steven Caldwell) join the recurring or main cast.
: This episode marks the beginning of the departure arc for Rainbow Sun Francks (Aiden Ford) as a series regular. Reception and Impact [S2E1] The Siege: Part 3
: While the immediate threat is neutralized, long-range sensors detect 12 more Hive ships inbound. : Paul McGillion (Dr