I had always assumed that Zhao Zi was completely faking his heart palpitations to stop the Captain yelling at him, but it being real and stress-induced definitely makes sense (poor muffin needs cuddles.... JACK!)

I love that TY's house has a special interrogation room, and it includes a comfy sofa.
:DD Comfort is very important!

"OH NO, HE'S CUTE"
He even has cute hair - that little sticky-uppy bit!