A news crew is a little too close to the truth when they discover information about the X-303, and the fact that it makes use of an element not found on Earth. As O’Neill (Richard Dean Anderson) and SG1 attempt to deal with the news team, they realize their troubles are just beginning in Prometheus.

Written by Joseph Mallozzi and Paul Mullie, this episode was first broadcast on 23 August, 2002.

Carter (Amanda Tapping) is approached by Julia Donavan (Kendall Cross) about trinium, and the code name Prometheus. Who’s the leak? And what can they reveal to the public? Can the convince the press to keep quiet before they go live with their story in four days?

Major Davis (Colin Cunningham) joins Carter in attempting to quell the story. Even reaching out to her producer, Martell (George Wyner).

They reach a deal to let Donavan document the project, but that could be a bigger problem.

We finally get to see the X-303 – Stargate Command’s first space cruiser! But Donavan’s crew led by Smith (Ian Tracey) are here to seize control of it, holding Carter and Jonas Quinn (Corin Nemec) hostage.

They will blow up the ship if Simmons (John de Lancie) and Conrad (Bill Marchant) aren’t released immediately.

O’Neill, Davis and Teal’c (Christopher Judge) try to figure out a way to stop things on the outside, while Jonas Quinn and Carter attempt to delay things inside.

We must be racing towards a To Be Continued as Simmons tasks command of the Prometheus and launches into space. But Teal’c and O’Neill have a plan, grab a 302 and race to catch up with the 303 before it’s too late.

It’s all an NID op to steal the Prometheus and recover a cache of weapons on a distant planet.

Our team reunites, and recovers the Prometheus, but we’re out in the middle of nowhere, and Carter reveals that without knowing where they are, they can’t head for home…

But hey look it’s Thor (voiced by Michael Shanks) who comes to them asking for aid… the Replicators are overrunning the Asgard homeworld.

Unnatural Selection continued the story almost four months later when it debuted on 10 January, 2003. Written by Brad Wright who wrote the story with Robert C. Cooper, and included excerpts by Jeff King, Thor wraps up most of the issues from the previous episode before the opening credits.

Once that’s out of the way, Thor recruits the X-303, now fully restocked by the SGC and not called the Enterprise, and SG1 to enter Asgard space and stop the Replicators. It seems the Asgard trap of a time dilation device to hold the Replicators didn’t work.

Instead of slowing them down to an almost imperceptible crawl, they’ve advanced themselves.

Can SG1 not only get the 303 (possibly christened Prometheus but who wants to embrace Greek tragedy?) where it’s going with just the four of them? The ship is massive!! And can they stop the Replicators and possibly trigger the time dilation trap the way it’s meant to be?

SG1 isn’t ready for what they find.

The Replicators are now mimicking humanoid life and are led by First (Ian Buchanan)! O’Neill is going to have to face a tough moral decision to complete their mission, which will in clude a betrayal of a newly discovered ally among the Replicators, Fifth (G. Patrick Currie).

It’s a tense, well-written episode, and worth the four-month wait. Just wow!