Nolan's space epic explores several themes, but its most central are about human connection and the effects of loneliness. The concept of sacrifice — intentional or otherwise — is ultimately a bridge between these two concepts. Damon's Mann wields all three in his brief appearance, manipulating data and the hopes of the Endurance crew to save himself and avoid being sacrificed for the broader mission. It's the kind of character archetype Nolan knew audiences' wouldn't expect from the star who launched his career with Good Will Hunting.
"Matt has the most amazing ability to project integrity and warmth," Nolan told Inquirer. "So he turns up in the film, and he's got a plan, and it's all going to be okay. For me, to realize that he's a frail human being and subject to cowardice and all the terrible weaknesses that we all have... he loved that challenge. I loved what he did with it."
For Interstellar producer and Nolan's partner, Emma Thomas, the decision to cast Damon wasn't just about people's first viewing, either. Because of the nature of the twist, Thomas and Nolan believed the actor's role in the film would provide viewers with a different narrative and emotional experience when they went to watch it for a second time. "If people get to watch the film twice, it's so great watching Matt when you know what's really going on," Thomas said.
