The following story contains MODERATE SPOILERS for the third season of "Doctor Who."

Since its revival in 2005, Doctor Who always has been plagued by rumors and unconfirmed reports about the status of its various actors.

This year in particular has been a difficult year for the series with rumors running rampant about what to expect in the third season finale. Who will live, who will die and just what exactly will be the cliffhanger to carry us over into the next Christmas special?

Initially, rumors indicated that series star David Tennant would depart the series at the end of this year. In the weeks that followed this, however, additional reports began circulating that Tennant had worked out a deal with the BBC that would have him earning £76,923 (approximately $150,907) per episode of the series and that he was there for the long haul.

More recently, The British Sun went head-to-head with the BBC, insisting that newcomer Freema Agyeman (who plays Martha Jones) was being sacked from the show due to concerns over her performance. The BBC quickly hit back that they were ecstatic with Agyemans portrayal on the series, and that she would be returning for another year.

Obviously with so many conflicting reports on what to expect from The Last Of The Time Lords and the future of the series, many fans are still wondering who will be returning next year. And if Tennant himself has anything to say about it, fans will be kept guessing until the last second.

"That's the question that I have learnt not to answer," Tennant told the Australian Courier Mail newspaper this week. "That's the first thing I was asked [when I took over in 2005]: How long are you going to stay?That could give a boy a complex.

"The thing is if we all say how long we are staying, it takes all the suspense out of it, We are trying to keep it as mysterious as possible about who may not be there at the end of Episode 13. So, [Season 4] has not started shooting yet and no one knows who will be in it : it's a thriller, you shouldn't know who is going to survive."

The paper reported that Tennant had a high-level meeting with the BBC head of drama earlier this week, however the actor refused to go into detail on the content of the meeting. Instead, the Scottish actor praised the talents of his co-star Agyeman who joined the show at the beginning of this season, insisting that she was everything that he was hoping for.

"Freema nailed it from the beginning, Tennant insisted. It was tough for her because Billie [Piper] is a big star and was loved by everybody from before Doctor Whoand certainly as a consequence of it. So, to come in and be compared to Billie and all that would have been hard for anyone. But Freema has just done it. And no one has said she is not matching up. She's such a huge hit in the part and it has been fantastic to see and share that with her. She has hit the ground running and has become a big star here in the past 10 weeks, and rightly so."

Agyeman, who was originally cast in a guest role in the penultimate episode of Season 2, impressed showrunners so much that she was invited back for a round of secret auditions before finally being told she is the new companion.

In the final three episodes of the third season, The Doctor is re-united with his former traveling companion Capt. Jack Harkness (played by John Barrowman), who left the series to star in his own spinoff show Torchwood.

At the end of the first season when Rose defeated the Daleks, Jack was resurrected by the power of the time vortex and was left on Satellite Five to find his own way home. It was only once he returned to Earth that he discovered his resurrection came with an unusual curse -- he cant die.

Originally, the Harkness character was introduced for only a few episodes but due to his popularity the BBC decided to cash in on his potential.

"I didn't expect he would become such a popular and iconic character with the British public," Barrowman told the paper. "After he appeared in the first episode, I checked out all the blogs and sites to see what people thought of him. We wanted him to be a jerk, a rogue with attitude, and they didn't like him. But in the following week they suddenly turned and they loved this guy. He was something they had not seen before, he was refreshing and that was it -- the launch of Capt. Jack."

Doctor Who makes its debut on the SciFi Channel on July 6, with Torchwood launching on BBC America in September.