Who is responsible for killing the mission director?

The mission director is responsible for his own death as a consequence of his decisions and actions. In the context of the narrative, the director's choices lead to a dangerous situation that ultimately results in his demise. This highlights a theme often explored in GATTACA—the implications of individual actions and the moral dilemmas faced in a society driven by genetic discrimination.

The character's demise serves as a critical turning point in the story, reflecting the complex interplay of fate and agency that pervades the film. By portraying the mission director as the architect of his own fate, the narrative underscores the idea that individuals are often trapped by the systems they uphold, resulting in tragic outcomes that may stem from their own flaws and ambitions.