You can see it in Walt's nervous chatter during the scene, as well as in the fact that Gus knows he doesn't need to say a single word to make his point. (Esposito, Cranston and Gilligan break down the scene here.)
Nothing more than letting a couple of people see him when he went to check if Jesse had really shot Gale, and possibly being arrogant enough to think he could cook as well as Walt and Jesse do. (Though Walt and Jesse's attempts to shove Victor's body in a barrel was just as grimly comedic.)
And yes, Jesse really did shoot Gale. The show did a slight head-fake by focusing first on the bullet hole in Gale's tea kettle, but Jesse is now in just as deep as Walt is. There's no question about Gale's fate, but we're hoping that somewhere down the line this season we'll see the character again in a flashback.
The scenes with Hank and Marie were a little tougher to deal with, but that seems like the point.
The premiere of Breaking Bad didn't focus on Walt- whether or not we wanted it to. We left last season at a stale mate- did jesse kille gail? Did Walter's plan work?
If you didn't know, Vince Gilligan is a f*cking genius.
This episode shows that while Walt has broke bad (in previous seasons), Skyler is just short of being an enemy herself and Jesse has moved into a land while moral complications are a non issue- a direct response from White's choices. I think that Jesse won't be heartbroken anymore, rather numb and still confusing his relationship with Walt. Mentor/Mentee? Walt is still Walt. You are not innocent Walt, you are anything but.
Star of the episode: It was a tie between Jeremiahs Bitsui's Victor and Betsy Brandt's Marie.