AirLockAlpha.com

This story contains MAJOR SPOILERS for the fourth season finales episodes of "Doctor Who" which have yet to appear in the United States.

In what might be considered one of the best "Doctor Who" cliffhangers of all time, David Tennant's 10th Doctor is mortally wounded and the final seconds have fans seeing him go into regeneration mode.

But is this truly the end of Tennant's work in "Doctor Who"?

Outgoing executive producer Russell T. Davies won't say for sure, but he tells The Daily MIrror that "Doctor Who" will go on with or without the star.

"I love David, and he is brilliant, but I was a child when Jon Pertwee handed over to Tom Baker," he said. "I was 11 when Jon Pertwee left and it broke my heart. But then along came Tom and he was just spectacular in it, so I suspect that will happen again."

Head honchos at BBC, as well as some of the fans, were concerned when the series decided to hand things over from Christopher Eccleston to Tennant after the first season, but fans made the transition quite easily, Davies said.

"We change our cast every year, and our viewing figures go up," he said. "It just proves that 'Doctor Who' is bigger than any actor. I couldn't say David was the best Doctor every because you are talking to an old 'Doctor Who' fan, and I love them all."

Very few people have had a chance to see the fourth season finale, which airs in the United Kingdom Saturday night. Not even the Controller of BBC One or the network's head of drama. But Davies has seen it ... more than once.

"There are probably 10 of us who have watched it, including David ... and Catherine Tate. That's about it," Davies said. "I've seen it about 15 times. I'm busy at the moment, but I had an hour off yesterday at 3 p.m. and I watched it again because it is such an exciting episode. And I will be watching it on Saturday night at home in Manchester with my boyfriend.

"It is pure 'Doctor Who' and so mad. You are watching it thinking, 'Star Trek can't do this! Even Star Wars can't do this.' All those things have spaceships and monsters, but this has a temp from Chiswick played by Catherine Tate, and Billie Piper with a great big gun. We have got Freema [Agyeman], who gets a remarkable story, and some of her best material ever. It plays to 'Doctor Who's' strength."

Fans had a chance to see yet another regeneration at the end of the episode, but that is only the beginning of "Journey's End."

"It was a huge adventure last week with David regenerating, and that was just the start," Davies said. "It is going to go up and up from there. The Doctor is in danger, the companions are in danger, the Earth is in danger and the Tardis is in terrible danger. I think it is the most exciting episode we have ever produced."

What's next on Davies' plate is hard to determine. He will leave "Doctor Who" following the specials that will fill the void in 2009 while the show takes a break.

"I have got about 27 ideas boiling in my head and that is the main reason why I've left," Davies said. "I love 'Doctor Who' and I never want to go off it or get bored. Right now, I want to go and work on [Season] 5, but I know that means it is the right time to leave. I get a lot of people who want me to come and make a family drama for them, but having done 'Doctor Who,' I have done the best ... anything else would pale in comparison."

Jipsee has posted a BBC News video clip from Friday that shows an exclusive sneak peak of the finale featuring John Barrowman's Capt. Jack Harkness and some details about the secrecy surrounding the final episode by clicking here.

"Doctor Who" airs in the United Kingdom on BBC One, and airs a couple episodes behind on the SciFi Channel in the United States.

Vote now for your favorite actors, television shows, movies and more in the 2008 SyFy Genre Awards! Find out all the details by clicking here, and watch a video showcasing all the nominees right here.

Feeling a little horrific? Get your daily dose of horror news straight from The Doll, Rabid Doll that is at www.RabidDoll.com.

Hear Michael Hinman on SyFy Radio every Wednesday at 10 p.m. ET/7 p.m. PT at www.BlogTalkRadio.com/SyFyRadio.