On really long flights like that, there are usually 2 crews. First crew flies half the trip while the second crew sleeps. Then they switch at about the mid point. On really long flights, they may switch twice, so the same crew takes off and lands.
I’m 82 and get plenty of those, but I’m not senile yet. Haven’t ever fallen for one. Remember the African prince or the finance minister’s widow? We’ve gotten away from those, mostly.
On really long flights like that, there are usually 2 crews. First crew flies half the trip while the second crew sleeps. Then they switch at about the mid point. On really long flights, they may switch twice, so the same crew takes off and lands.