In the 2013 film Oblivion, protagonist Jack finds out that he is actually
one of many clones made from the original Jack. During the course of the film, we see Jack (Jack-49) meet another clone, Jack-52. About mid-way through the film, Jack-49 conceives a daughter with love interest Julia.
At the end of the film, we witness
Jack-52 arriving at the lakehouse where Julia and her daughter - now a toddler - are living.
Why did it take Jack-52 three years to show up, and where was he during that time?