With the Season 7 premiere, George proposed to Susan, hoping to rekindle their romance and demonstrate he was a changed man.
What made the character's death so surprising was that rarely were there permanent consequences to any character's actions, let alone fatal consequences, on a show known for being relatively light-hearted.
With the next episode, Kenny reappeared, seemingly unharmed, with no character mentioning his prior death, only for him to die again.
Throughout the series, Grey's Anatomy gained a reputation for its revolving door of characters, with every character that moved on from the hospital or got killed getting replaced by someone new to take up the slack.
In Season 4, Fring proved to be an inescapable threat for White, making Fring do whatever it took to keep his drug-dealing business functional, leaving White with no choice but to take drastic measures.