"The Other Son" starts with Joseph Silberg(Jules Sitruk) finding his being inducted into the Israel Defense Forces getting a little complicated. This has less to do with his occasional hashish use than with his blood type which is incompatible to his parents, Orith(Emmanuelle Devos), a doctor, and Alon(Pascal Elbe), a colonel. Playing a hunch, a colleague of hers traces the conundrum back to the night Joseph was born in a hospital in Haifa. During an air raid, he was accidentally switched with the baby of Leila(Areen Omari) and Said Al Bezaaz(Khalifa Natour) of the West Bank. At least it looks like Joseph may get out of military service while his opposite number, Yacine(Mehdi Dehbi), returns from school in Paris.
One may not be exactly wrong in assuming the whole switched at birth motif has been done to death with ABC Family currently gnawing on its bones on a weekly basis. Even lacking much of a story, "The Other Son" finds a new angle by employing it to smartly explore the nature of family and identity in Israel and the West Bank where two peoples are kept separate against each other, as exemplified by a lovely shot of a person walking along the security wall at night. Sure, it may ask a lot to believe that some interests like medicine and music are genetically transmitted but that's just a valuable reminder that we are not so different after all.