|An episode from Stargate Atlantis|
|Directed by||Andy Mikita|
|Produced by||Andy Mikita|
|Original air date||
USA: August 22, 2008|
UK: September 24, 2008
|Rodney McKay is stricken with a mental affliction that robs him of his knowledge and memories, causing him to revert to a childlike state.|
- David Nykl (Dr. Radek Zelenka) is credited but doesn't appear in this episode. He had effectively shot some scenes for this episode but all of them were cut out to fit the duration.