Played by Kavan Smith, Evan Lorne was first introduced as a recurring character in the seventh season of Stargate SG-1, holding the military rank of Major in the United States Air Force.

[1] Lorne reappears as a part of the new personnel sent after the Wraith siege by the Daedalus[2] and serves as Atlantis' military second-in-command under Lieutenant Colonel John Sheppard.

Lorne is one of the Atlantis Expedition members in "This Mortal Coil" that the Replicators take the form of, but they are all killed by Oberoth.

Lorne is stunned by Ronon Dex, and while being questioned by Dr. Kate Heightmeyer says that he "hadn't had a sleepwalking incident since he was ten."

In "Tabula Rasa", Lorne, while being semiamnesiac, takes a severe overdose of a delaying medicine that is supposed to hold back the illness.

[8] Sometime after shooting "Enemy Mine", the producers wanted to talk to Smith about the possibility of having him return to the spin off series, Stargate Atlantis.

[9] When talking about season two of Stargate Atlantis, staff writer, Martin Gero said Lorne had become the most notable recurring character of the series.

[10] In an interview with Smith, it was revealed that Lorne's first name was decided to be "Evan", later confirmed by executive producer, Joseph Mallozzi.

[8] In the episode "Spoils of War", a character was going to call him "Uncle Evan", this scene was cut off, because of time constraints.