Revealing mistake: When Jack says "Screw you" to Sergeant Sykes, Sykes pulls his pistol and shoots Jack. You see the gun flash, and you see an impact on Jack. But if you watch closely, they do not line up. The special effects charge goes off indicating the hit on Jack's right breast. But when the gun goes off, while still moving, at that moment it was pointing at Jack's lower left abdominal region. (00:58:50)
Oblivion (2013)
1 revealing mistake - chronological order
Directed by: Joseph Kosinski
Starring: Morgan Freeman, Tom Cruise, Olga Kurylenko, Andrea Riseborough
Continuity mistake: When Jack sets up the motorbike, he pivots the two bars forward and locks them to form the handlebars. A few shots later as Jack looks down at the sensor, you can see one solid handlebar, all the way across. (00:13:45 - 00:14:25)
Sally: There's been a pattern of insubordinate behavior recently.
Jack Harper: Yeah. I feel bad about that.
Trivia: At the start when the UNIVERSAL writing comes around the Earth, the TET can be seen in orbit.
More questions & answers from Oblivion
Answer: Jack and Victoria believe that they are there on behalf of the human race, so it makes sense for them to have a human face to interact with. Sally is a logical candidate - the Tet would presumably have intercepted her transmissions to the Odyssey and would therefore have plenty to work with in constructing their fake Sally as an interface with their clone workers. It's not made clear in the movie how the original Jack's memories of Julia survived to resurface in his clones, but it seems reasonable that it might be related to the powerful emotions that are associated with those memories, in this case his love for his wife. Sally and Victoria would also feature significantly in the original Jack's memories, but without the same emotional investment, those memories failed to make the transfer into his clones.
Tailkinker ★