Rodney is infected with a deadly illness known as "second childhood" which diminishes his mind capabilities and makes him lose his memory gradually.
Episode rating
Cast of episode
78
12
5
3
1
- Dr. Rodney McKay
- Dr. Jennifer Keller
- Ronon Dex
- Lt. Colonel John Sheppard
- Teyla Emmagan
- Richard Woolsey
- Jeannie Miller
- Dr. Radek Zelenka
- Amelia Banks
- Smitty
- Marine
- Parker
- Doctor
- Billick
- Marine