Episode 21: The Red Glow (2003 series)

Synopsis
Scar, Lust, Gluttony, and Greed are zeroing in on Laboratory Five -- but the biggest threat to Ed may be his own morality when he's tempted with the power he's sought for so long.

Trivia and See Also

 * This episode is adapted from content in Chapter 12: The Definition of Human and Chapter 13: Fullmetal Body.
 * Fullmetal Alchemist screenwriter Sho Aikawa decided to expand upon the Fifth Laboratory story with this episode. This included adding characters such as Scar, Greed and Kimblee in order to engage viewers and set up future plotlines.
 * The main goal of this episode was to portray parallel storylines (such as Ad/Scar, Ed/Tucker), in order to make the narrative more interesting.
 * Episode 8: The Fifth Laboratory (2009 series)