Well, if you didn't know, now you do. The brothers who weren't talking to each other for eight years (ever since Chirantan's father, Vikram's uncle, died) have now made up and are working together on three of Vikram's films– Three, Shaapit and Apna Sa.
It so happened, that when Vikram heard the Mission Istanbul song, he was impressed and wanted to know more about the composer.
Anjorie Alagh told him that it was composed by Chirantan. When Vikram learnt that his cousin had composed it, he immediately called him up and buried the hatchet. Vikram, however, wish his uncle was alive to see his son's talent.