2. The End of the World

Those are real tears, as a character expresses her sympathy for his loss. He actually managed to make one fall, but I couldn't find a screen capture of that.

3. The Unquiet Dead

Glad they met, and ready to die together

4. Aliens of London

"Excuse me, do you mind not farting while I'm saving the world?"

5. World War Three

This is the moment he fell in love with Rose.
"I could save the world but lose you."

6. Dalek

Russell T. Davies told writer Robert Sherman, "We need a scene where we get Chris's shirt off and torture him."

7. The Long Game

A delicate operation
 

I list this first, because it's the character I love the most. And it's the first time I got to see a glimpse of the real Chris. In general, he completely immerses himself in his characters, but this character was a lot like him. I could see it in his BBC Breakfast interview on the DVD set, and he said it himself at a press conference (click on the Dr. Who tab, then listen carefully).

For those not familiar with the show, first a bit of history. It ran from 1963 to 1989 with seven different actors playing the title role (they could do that, because he's an alien who will regenerate instead of dying, but when it happens, he looks completely different, and has a slightly different personality).
In 1996, BBC in conjunction with Fox in the US made a pilot movie to try to bring back the show. But Fox is terrible about science fiction, and they decided since the pilot didn't get overwhelming figures, they weren't going to do it. The movie introduced the eighth Doctor (Paul McGann), but he was never seen again (though he was popular in novels and other side media).
Finally, in 2005, BBC Wales brought it back, with Chris as the ninth Doctor. It's a little different, with most storylines filling only a single 45-minute episode, instead of four to six 25-minute ones. There is also a loose story arc linking a full season of episodes (which was done on Doctor Who in the past, but with consecutive serials only, rather than returning to a plotline from several episodes back).

Review

The only thing I will say in review is that every episode was excellent, and all together, the first series of the new Dr. Who was the closest thing to perfect that television ever gets.

Chris's role

The Doctor (he's only actually called Doctor Who when someone asks his name and doesn't accept the answer), as I mentioned, is an alien. He's called a Time Lord, though that's not the name of his species; it's a title for the educated class. As the name implies, he's a time traveler.
Initially, he was on the run from the rest of them because he didn't agree with their policy of non-interference; he believed in helping out wherever he went. Later, the Time Lords were using him to fix things they wanted fixed. But Chris's Doctor is the only one left, because they all died in a war, completely erased from time. Despite his terrible relationship with them in the past, he misses them a lot. He has always liked and traveled with (and even loved) humans, but it's not the same as having someone of your own kind.

The Doctor has always been a scientist, an explorer, someone who loves life and believes in its value, no matter the species. He has always been more emotional than the other Time Lords, who valued intelligence and rationality above all else. He's also at least a little arrogant, but generally it's endearing.
The ninth Doctor is grieving for the loss of his people, and worse, feels guilty not to have joined them. Though he still loves life as much as the Doctor always has, part of him believes he has no right to it. He seeks danger and even death, though when it is imminent, he realizes he still wants to live.
He is much more tactile than his previous incarnations, holding hands with his companion and hugging people he meets (he even says, "I'll hug anyone.") He refers to kissing complete strangers in Paris.
In the original show, there have been very subtle suggestions of a romantic relationship with his companions, but nothing confirmed (and many fans deny even the suggestions). In the new series, the Doctor is clearly in love with his companion, Rose Tyler (Billie Piper) (though of course those same fans still deny it), but he doesn't dare to tell her. I think that's mainly due to his guilt, not just over surviving when the rest of his species did not, but also about bringing her with him through so much danger. But he can not deny that he is lonely and needs her around, and besides, she saved his life several times over.

Chris emailed Russell T. Davies to be considered for the part, only to learn that the producers were already considering him but didn't think he'd be interested! He wanted the chance to show people he could be funny and charming, not just dark and brooding. He was right. Although he did only one series (Americans, that's the same thing as a season), he will always be my favorite Doctor.

Candy
The shirtless torture scene in "Dalek"; V-neck shirts that show off his graceful neck; lots of hugging, holding hands, lounging, and smiling; a little bit of kissing; natural accent (or so close I can't tell the difference, anyway)!

Trivia: Chris was the first actor to play the Doctor who was born after the show started. He wasn't a fan as a child, because he was put off by the cheap sets. (Peter Davison, #5, was the first to grow up watching it.)

9. The Empty Child

An uninvited guest at an uninvited party

10. The Doctor Dances

...in more ways than one...

11. Boom Town

Nice catch!

12. Bad Wolf

Captured by the wolf and thrown to Big Brother...

13. The Parting of the Ways

Sympathy for the Daleks. "You hate your own existence..."

13. The Parting of the Ways (again)

How could I possibly leave out the best moment?
 

Heroes is generally considered a sci-fi show because most of the main characters have some kind of superpower. The premise, for the first season anyway, is that one character has had a premonition of an explosion that will destroy New York City, and they are trying to prevent it.

Review: I only started watching this show after Chris joined, but in only two episodes, I got interested in the story. Or rather, stories; not all of the characters have met or even know of each others' existence, so their tales are still separate. 

Chris's role: We first saw the character in Peter's visions, just laughing. When Peter finally met him, he was stealing money in plain sight - and it turned out Peter was the only one who could see him, because he has the power of invisibility. When asked who he is, he replied, "I'm no one. I'm the Invisible Man. I'm Claude Rains."

He seems to be a loner, and was very gruff at first, refusing to have anything to do with Peter, but later he turned up again, offering help. He used to work for those who are doing experiments on people with powers, but his conscience got the better of him. He gave Claire's father a chance to do the right thing back then and got shot for his trouble. He's been in hiding ever since. Everyone calls him Claude, even in the flashbacks, though I doubt it's his real name.

Claude in the old days