Emma Cooper (Adria at age 4) is the real life daughter of writer and executive producer Robert C. Cooper.

Beau Bridges (General Landry), Gary Jones (Sgt. Walter Harriman) and Robert Picardo (Agent Woolsey) all also appeared in the Stargate Atlantis Season Three episode "No Man's Land." Both episodes originally aired on July 14, 2006.

This is the first season premiere since "Enemies" which only consisted of a single episode.

Claudia Black (Vala Mal Doran) joins the regular cast in this episode.

This is the final episode of the series to feature scenes on Chulak.

Vala: (about Adria) Oh, she's been genetically altered. She'll be a fully grown figurehead in a day or so. And if she takes after her mother, she'll have a pretty good figure too.
Daniel: This is bad.
Vala: You're telling me! Origin is about to become a lot more appealing to the males of this galaxy.

When Mitchell wakes up after hearing Sam, the ship's power systems and engines are dead. But if he had left the Korolev as it was destroyed, the force of the blast would've sent him hurtling through space. There's nothing that would have stopped the ship from moving after the blast without damaging it severely.