CHIVILCOY,
It would usually depend on where the aircraft was going next as to whether the same crew operate the return leg. There are many examples, firstly if the aircraft was only turning around back to AMS then after a 4 hr flight I would assume the same crew would operate that return sector (a shuttle). However it would be possible that the aircraft may continue from Cairo to another destination where your crew would have continued on to or they may have changed crew for the following leg. It all depends on their flying pattern. I would assume though if it was just a turn around it would have been the same crew.