Lately I've been watching Community and Awake. You folks heard of Awake?

Awake is certainly an interesting one. It's a show that lasted only a season before it was cancelled but it had an interesting premise. The basic premise is that a detective gets into a car crash with his wife and son. His son dies in the crash and life continues on. Except that when he goes to sleep, he's awake in a reality where it was his wife that died instead.

To him, both realities feel real to him. He sees psychiatrists in both realities that are trying to convince him that the other is just a dream. He works different cases in the realities but each reality appears to be giving him clues for the other case.

The acting is rather good, a good sense of intrigue and cinematography to help differentiate the two realities. It received positive reviews from critics but people just weren't watching it. There's no dvd/blu-ray of it so you can only check it online I guess.

Mind you, if they're hoping Nick will pay for a 4th season, you wouldn't expect them to say anything else.

I seem to recall Mako lightning-bending in an episode waaaaay back in season 1 when he was working in a factory to raise money for the pro bending team with a bunch of other fire benders that could do lightning. I think it was to show that these techniques from the previous series were becoming more common place, like metal bending.

...I think that was the only time he used it too,  unless he used it in the series 2 finale at some point.

I don't think the poison needs to be set up so elaborately. It's poison. We understand how poison works. It's not even a magical poison or anything. A lot of people have speculated that it's mercury.