Maybe it's weird of me, but I really like it when a TV show's able to realise the good things that happened to it by chance, and to capitalise on them. After all, what would Breaking Bad have been like, if Gilligan had stuck with his original plan to kill of Jesse at the end of the first season?
There's a few more dramatic examples of actors moving up the cast list, though - at least Aaron Paul was always supposed to be main cast, right? So, here are a couple of fun examples of TV producers making the most of it when they inexplicably strike acting gold.
Jason Dohring - Veronica Mars
As a pretty big Veronica Mars fan, I know the weird way Jason Dohring wound up as the romantic lead of the show (Logan Echolls).
Dohring was originally cast as the random douche/troublemaker/psycho best friend of the intended main love interest, Duncan Kane. He wasn't even supposed to be main cast, but more of a recurring spanner in the works for our dear heroine.
After the pilot was shot though, he'd already impressed enough that he was main cast from the start. As the first season progressed, he got more and more screen-time, and eventually became a proper love interest for Veronica.
By mid-way through the second season, he was clearly tied for secondary lead with the character of Veronica's dad, Keith Mars.
Cut to this year, and he was the obvious and only choice for second lead in the fan-funded movie. He hasn't been a massive success otherwise, but he was just right for that show.
Colm Meaney - Star Trek TNG/DS9
They'd take away my nerd-card if I didn't mention Mr. Meaney here. Colm Meaney appeared as Chief Miles O'Brien in both Star Trek: The Next Generation, and Deep Space Nine. He is the only performer to appear in both the pilot and the finale of each show.
The weird thing? In the pilot of TNG he didn't even have any lines - if the camera hadn't lingered on him briefly, he would've officially been an extra. But they kept putting him in.
People got curious about this guy who was always in the transporter room - I guess he had an interesting face. Eventually, he had lines and even a name for his character! He became a recurring side-character for TNG, plots and all.
When they were starting another series (DS9), the producers were happy to take one of the obvious choice characters to be a regular - this way TNG didn't lose any regulars of its own to a show that might not succeed, and Meaney got a slot as a regular on a network TV show making a full 24 episodes a year - a win-win.
In DS9, Meaney really got the chance to shine as a central character - the writers even used his relatablility as a quick route to the heart of the viewers; in fact, they had a slogan for it - O'Brien Must Suffer. He was a major part of the show until the end
And why was he in the final of TNG when he was starring on another show? They got him back especially - you gotta have O'Brien!
TL;DR
I like stories of unexpected actor-ly success! Also, I am a nerd. Basically, this was stories of actors overachieving in their TV roles and getting more screen-time as a result.
So, does anyone else know any stories like this from their favourite shows? (Or even shows with which you have a complicated relationship?)