Kate Hewlett returns to Stargate” Atlantis in Miller’s Crossing. Written by Martin Gero, this episode was first broadcast on 30 November, 2007.

McKay (David Hewlett) returns to Earth with Sheppard (Joe Flanigan) and Ronon (Jason Momoa), when his sister, Jeannie (Kate Hewlett) is kidnapped. Her computer was being monitored and it’s all about getting McKay back to Earth, so that they can grab both McKay’s – seeing as they are both geniuses, and aware of the Stargate Expedition.

Henry Wallace (Steven Culp) is behind it all, and he knows all about the Stargate program, despite not being cleared for it. He wants help curing his daughter, Sharon (Libby Osler). He’s injected her with the replicator nanites the expedition have been working on, and wants both McKays to perfect it and save his daughter.

If Wallace is telling the truth, then he’s not a real villain, he’s just a father going to the extreme for his daughter.

Meanwhile, Sheppard and Ronon are trying to recover the pair.

Anytime the Hewletts are together is gold; they are wonderful onscreen. And things are escalated, when Wallace injects Jeannie with nanites to motivate him to work. Things go from bad to worse, when the nanites initially heal Sharon of her disease, and then go to work on all the other problems in her body – which causes them to shut her heart down, starving her brain of oxygen and leaving her in a vegetative state.

And the nanites in Jeannie? They’ll go after her epilepsy and that means shutting down her brain…

McKay and the rest are going to have to find help from an unusual quarter, the Wraith (Christopher Heyerdahl). Can a deal be reached?

There’s a fun bit with Ronon and Walter (Gary Jones). That ties us in nicely with Stargate Command, and SG-1.

I really like this episode, and it’s all about family and the lengths we go to for the ones we love.

This Mortal Coil sees strange behavior sweeping Atlantis when a strange satellite crashes into the city.

Written by Joseph Mallozzi and Paul Mullie from a story they developed alongside Brad Wright, this episode was first broadcast on 7 December, 2007. This is the mid-season mark, but there’s no big break between this and the next episode.

As the episode opens we learn that the gate has been down for a week because of an update McKay was running. When he runs a diagnostic, he and Zelenka (David Nykl) discover nanite code, which could mean trouble. But what of this strange satellite and how was it able to breach the city without detection?

When the drone/satellite self-destructs, McKay has some suspicions of things seeming off. And Ronon is the first one to voice that everyone is acting strangely. Sheppard has a head wound completely vanish.

And Keller (Jewel Staite) and Lorne (Kavan Smith) seem to be up to something…

It seems everyone on Atlantis isn’t real? a replicator?

Sheppard, McKay, Teyla (Rachel Luttrell) and Ronon, who are convinced that they are themselves, investigate on their own, and find a number of shocking truths. They are all infestted with nanites, and none of this is real.

A rogue group of Replicators are using Weir’s (Torri Higginson) memories to create their own version of Atlantis.

Sheppard and his team aren’t the real Sheppard and gang, they were created by the Replicators. They are studying the team and their reactions, preparing for what is to come…

They are studying Atlantis, trying to find a way to grow into humanity, compassion and hopefully ascension, Not to mention hiding from Oberoth (David Odgen Stiers). Unfortunately, the other Replicators have found them and are on the way.

The fake Atlantis is destroyed by the alternate Sheppard and his team are able to get away and head to the real Atlantis to provide help to their alternate (real) selves by sharing all the Replicator information they have.

When the two groups meet on a remote planet, they attempt to find a way to move forward together, but trouble follows them in the form of a Replicator ship. The real team is able to escape thanks to a sacrifice made by their alter-selves.

The series says goodbye to Weir with this episode, and McKay is able to decode the Replicator information and discover that the pose a bigger threat than originally thought.