Stargate Atlantis/Recap/S04 E10 This Mortal Coil

With the stargate inoperable, probably due to McKay messing with it, everyone in Atlantis is acting a bit distant, stir crazy, or otherwise Not Themselves. A probe suddenly crashes into the city, and McKay worries that the Asuran replicators have finally found them - but Zelenka tells him it's probably nothing. Then Sheppard comes down with mad healing abilities - but Dr. Keller tells him it's probably nothing.

Tropes

 * Acting for Two
 * Bus Crash: RepliKeller tells the team that the real Dr. Weir died some time ago.
 * I Say What I Say: The McKays do this, when they're not finishing each other's sentences.
 * Literary Allusion Title: to Hamlet
 * Recycled Script: This is pretty much the SG-1 episode "Tin Man."
 * Stock Quotes: the title.
 * Tomato in the Mirror
 * Also for the viewer, it may only be obvious after the first viewing, but the Asuran duplicates wear the old-style Atlantis uniforms from S1-2, instead of the S4 new-style ones sported by the real team.
 * What Measure Is a Non-Human?