A few months ago on TG 641, I noticed after takeoff that a passenger (presumably a Thai national) was seated in the last row of the middle section in the F cabin of a 747 (new nine seat configuration). Apart from this passenger, there were four of us in the cabin seated in the window seats of the first two rows (1A/K and 2A/K).

The strange thing is that I do not recall seeing this passenger before departure, even though I boarded close to the final call. What also just occurred to me as odd is that this passenger did not disembark with the rest of us seated in F, was not driven in the van, or with the rest of the pax as we were escorted to immigration. Come to think of it, he may have even disappeared from the F cabin before arrival in BKK although I do not recall for sure.

I assume he was not a non-reving employee or op-up passenger, as this would not explain why he seemed to disappear from the cabin before we arrived. Presumably anyone in the F cabin would receive the same ground service.

Could this have been a resting or deadheading crew member? Or perhaps this person held a ticket for a different class of service and was unofficially "upgraded" after the aircraft doors were closed for departure?