I didn't know Tim Russert on a personal level. I rarely even saw him in his own element as host of NBC's Meet the Press. However, when he suddenly died last Friday, it hit me like a ton of bricks. It was the fact that he was a huge presence on television, particularly during this year's Presidential election. It made Russert feel like he was a part of the family.

So it has been with many television personalities that have left this earth before their time. It's the intimacy of the industry and the fact that this person has come into our homes night after night, week after week, that the unexpected death of these personalities hits us much harder than, say, movie stars. Unfortunately, there have been a number of these surprising deaths over the last few decades. Here are 12 such deaths that affected millions of television viewers.

(Part 1 of 5) It's the time of year when we talk about what happened over the past year, and that unfortunately includes the deaths of many notable personalities. After the jump is a list of the celebrities and other TV-related people we lost in 2006, in no particular order. (Note: it's not easy to compile a list like this and I'm sure I forgot someone. Let me know in the comments and I'll try to add them.)

There was a lot of confusion last week when The West Wing's John Spencer passed away. Every single newspaper, magazine, and web site (including this one, but in our defense we missed the opening scene and were just repeating the news sites) reported that the character of Leo had appeared in a three years later flash forward in the first scene of the season opener. And that would pose a problem, since Spencer passed away and couldn't have been in a scene three years in the future.

But NBC is repeating the episode right now and it's official: Leo was not in the scene. So some of the speculation we talked about last week is still valid.