I'm pretty sure it was Logan that tipped off the Chinese. But that whole timing thing was a bit much. They've done that before trying to tie up loose ends.
I think Henderson is really dead. There was no one to witness that (Jack didn't realize the sailor-kid was watching). Although it did seem out of character for Jack.
Tony's dead too. There's no other reason to have had that in the plot line. But remember, only four people "knew" Jack was alive. Palmer, Michelle, Tony and Chloe. I think the wife said she saw the actor that plays Tony on a talk show and they actually held out on having his character die...but I could be making that up.
I wonder if we'll actually see Jack in China at the beginning of the next season or whether they'll give it as history. Having him in some remote location in China would make it nearly impossible for them to suspend enough belief to get him back to CTU in the same day.
I think we'll see Heller back. Not sure about Wayne. He was supposedly in a safe location where Bill/Curtis took him. However, he ~should~ have been at the airport to spit on Logan.
I would have liked to see a Wayne/Logan confrontation at the end.
"Hello, my name is Wayne Palmer. You killed my brother. Prepare to die."