Question: Why does Tim go by his brother's name instead of using his own?
Answer: He is stealing his brother's identity as an IRS agent to research the people he wants to help.
Question: How can a woman with such a serious heart condition have such toned arms? Muscles like Emily's requires some serious weight lifting which I doubt a serious ill woman like Emily could do.
Answer: In the course of the film it's revealed that Ben has done extensive homework and taken drastic steps to find the right person, i.e. a "righteous good person" to give them what he has left to offer. Therefore, he would have to find someone with his own rare blood type AND needed a heart...which he eventually did.
CCARNI ★