ABC's 'Castle' celebrates 100th episode – Actress Stana Katic reveals secrets to the show's success

On ABC's hit show “Castle,” actress Stana Katic plays detective Kate Beckett who investigates crimes in New York with novelist Richard Castle, portrayed by Nathan Fillion. The show focuses on the romantic tension between the two and their passion for solving crimes.

Actress Stana Katic joins “Starting Point” to discuss the hit series and the recent celebration of its 100th episode.

When the show first began “we were starting off and just trying to make it through our days,” says Katic. “We work many long hours… but that was it you just kind of make it one step at a time and then all of sudden we turn to a few weeks ago and it’s oh wow we’re filming the 100th episode.”

Katic says when the network first saw the pilot for the show, executives asked that the romantic relations between Katic and Fillion’s characters be pulled back some because “they look like they’re about to get together in episode two.”

"I think that bounce and that chemistry was there from the start. Otherwise I don’t know that we would have had a show,” she says.

“It’s been really fun kind of navigating what does it mean to work together and be in a relationship… it also plays into kind of the comedy and drama of this story because it’s not easy and the two characters have a point of view and most times the point of view is on opposite ends,” Katic adds.

ABC aired the 100th episode of "Castle" Monday, April 1 on ABC. You can also catch the latest episode on abc.go.com.