Phoebus:Is that any way to talk to your wife? Thalan? Run all you like. The moment I find you, you die.
Beckett:Well... they're heading straight for divorce.
Tropes
And I Must Scream: The imprinting technology effectively isolates the host’s consciousness within their own mind while the imprinted consciousness has complete control of their body; during which time the host personality can see and hear everything the imprinted personality is thinking and doing. As Weir described it:
Weir: The entire time I was shouting to everyone, but nothing I wanted to would come out of my mouth.
Be Careful What You Wish For: After finding out that the chances of reviving the woman in stasis are unlikely, Weir talks wistfully of what they could learn from her. A few seconds later, she is hit by a beam that imprints the woman’s personality into her body and it turns out she’s a homicidal, revenge-driven maniac who is willing to put the whole of Atlantis at risk to kill one man.
Biting-the-Hand Humor: McKay discourses (dismissively) on the nature of television shows.
McKay: Most of which are fictional representations of ridiculously attractive people in absurd situations.
Bottomless Magazines: Averted. Phoebus tells Teyla the only reason she didn’t shoot her is she didn’t know how many bullets she had left.
Defiant to the End: Notably, despite being imprinted much earlier, Phoebus took a lot longer than Thalan to fade from existence and, according to Sheppard, was trying to fight against it until the very end.
Even Evil Has Standards: Thalan at least is surprisingly diligent about not hurting anyone except Phoebus; at one point he's even shown setting Ronon's gun to stun to knock out Teyla, then switching it back to kill for Phoebus. By comparison, Phoebus is willing to murder everyone in Atlantis just to kill a man who will die in a few hours anyway.
Evil Is Petty: Moreso Phoebus than Thalan, but both soldiers insist on killing the other despite acknowledging that they'll both effectively be dead in a few hours anyway, because they want to go out a winner.
Grand Theft Me: Sheppard and Weir. Weir is accidentally snatched, but Sheppard's is voluntary (although under false pretenses) once Beckett confirms Phoebus!Weir's assertion that the effect will not last more than a day.
At the end, Caldwell's complete certainty they're back to normal, presumably is due to his own recent experience with this.
Here We Go Again!: McKay says this word for word once it is apparent that there is another consciousness occupying Weir's body, referring to the events of "Duet".
Indy Hat Roll: Of a sort; after being stunned by Thalan, Teyla wakes up just in time to avoid being bisected by a closing door when Phoebus locks down Atlantis.
Lockdown: Caldwell orders Atlantis to be locked down once Phoebus and Thalan start running amok in their stolen bodies. Invoked more literally when Phoebus uses Weir's command code to seal doors across the city.
Never Got to Say Goodbye: McKay posits averting this trope as the reason for the 24-hour Grand Theft Me function of the escape pods, although the Air Force Colonels Caldwell and Sheppard reason that it must be to turn the occupant into a living "Black box"flight recorder.
Properly Paranoid: Before Sheppard absorbs the consciousness of the man Phoebus claims to be her husband, Caldwell requests that he hand over his sidearm; a good move, as otherwise Thalan!Sheppard or Phoebus!Weir could have shot and killed the other then and there.
Caldwell: I'd prefer it if this alien consciousness weren't armed.
Say My Name: McKay shouts “Elizabeth!” as she faints.
flight recorder