Post Mortem is a short story, which was published by Titan Magazines in Stargate SG-1/Atlantis: The Official Magazine 23.
The Atlantis base is reeling after the sudden death of Carson Beckett. After returning Carson's remains to Scotland, Rodney McKay turns to an old friend for comfort...
The events depicted in this adventure are set just after the Stargate Atlantis episode "Sunday" in season 3.
An official extract: