I'm going on about 21 hours myself...(currently on RTD -- so close!).
I took your advice to not sleep on the plane -- watched FOUR movies and 1.5 episodes of True Detective. ;-)
p.s. I had the details wrong -- Helen Mirren (not Judi Dench) and Kenya (not Somalia).
Glad your travels went well. I watched 4-5 movies, but can't even remember them all. One, though, was a documentary called "The Biggest Little Farm" and it was fabulous.
I went to bed at hour 23 and woke up this morning at 6:00 with no alarm. Hopefully that does the trick.
Good luck with your meetings today.