Peter Capaldi's first 'Doctor Who' episode is "thrilling".
Writer Mark Gattis has described the Twelfth Doctor as an exciting change from previous incarnations played by David Tennant and Matt Smith and thinks fans will be pleased with Peter's debut episode which was written by show boss Steven Moffat.
He said: "Peter has a very different energy to Matt Smith and to David Tennant. He's older which changes everything ... it's amazing what a change does!
"Matt was sublime and I was very sorry to see him go, but it's also great to have a change, as it has always been with the Doctor."
Mark looks forward to seeing how Peter's Time Lord tackles situations and reacts differently to the previous Doctors.
He added to Digital Spy: "The Doctor's always the Doctor - but you can have a lot of fun playing with people's expectations. Everyone knows how the previous Doctor would react in any given situation and now you just don't know!"
The eighth series of 'Doctor Who' is currently being filmed in Cardiff, Wales, with Peter being joined by Jenna-Louise Coleman, reprising her role as Clara Oswald.
It was recently revealed that former 'Emmerdale' actor Samuel Anderson is also joining the sci-fi drama as a recurring companion, Danny Pink.

Michael B. Jordan has addressed criticism about his 'Fantastic Four' casting.
The 27-year-old actor puts the controversy surrounding his role as the Human Torch - a character who can absorb fire into his own body and is able to fly - down to fans who "don't like change".
This comes after questions of skin colour were raised since the African American actor will star as the brother of the Invisible Woman, played by Caucasian Kate Mara.
Jordan told Cinefilos.it: "It was expected.You kind of know going into it that people are used to seeing something one way. It's a continuity thing more than anything. People don't like change too much.
"But annoyed? Eh, just kind of accept it. It is what it is. You can't make everybody happy. You just got to accept that and know."
Jordan insists he is still "excited" about the role and is focussing on doing the "best job" he can.
He explained: "I'm an actor. I have to do my job. I'm going to do my job the best I can and the way I've been doing it my entire life, my entire career.
"I don't really let it bother me at all. I just kind of go into it and do the best job I can and walk away from it. We'll see what happens."

Uma Thurman is in talks for 'American Ultra'.
The 43-year-old actress is in negotiations to join 'Adventureland' co-stars Jesse Eisenberg and Kristen Stewart in the action comedy which will be helmed by 'Project X' director Nima Nourizadeh, reports The Hollywood Reporter.
The film follows the story of an "unmotivated stoner" named Mike (Eisenberg) who lives with his girlfriend (Stewart) in a small, sleepy town where their lives take an unexpected turn as he becomes the target of a government operation to wipe him out.
'Kill Bill' star, Thurman, will take on the role of a government worker who is furious upon learning that someone wants to kill Mike - who she trained as a sleeper warrior - and she will "fight back like a momma bear protecting her cub".
Anthony Bregman, David Alpert and Britton Rizzio are producing and they're excited about the project.
Bregman previously said: "American Ultra will be the most fun you can possibly have in a movie theatre without the use of drugs, fireworks, or canola oil."
Filming is expected to begin next month with Kevin Scott Frakes of Palmstar Media Capital and Raj Brinder Singh of Merced Media Partners stepping in as executive producers.

Jourdan Dunn is in complete awe of Beyoncé.
The model of the moment has been a fan of the R&B superstar ever since she was nine years old and embarrassed herself when she first met her idol at the Met Ball in New York City last May by asking if she could "hold" her.
She told Miss VOGUE magazine: "I used to pretend I was the fifth member of Destiny's Child. She saw us, smiled and began walking over. We both turned to see if Jay Z or someone was nearby. She said, 'Hi,' and told us that she thought we were beautiful. I think I said, 'Can I just hold you?' "
Jourdan achieved her life's dream this year by starring in the video for her track 'Yoncé' alongside Chanel Iman and Joan Smalls but she was nervous about the singer judging her performance.
She gushed: "I was the first one up, and Beyoncé came in and sat behind the screen to watch. It was like, 'Oh my god, no pressure!' "
The beauty - who also hosts a cookery series, 'Well Dunn' for Beyoncé's husband Jay Z's YouTube channel - was amazed to receive a personal invitation to the showbiz power couple's New Year's Eve party this year.
Jourdan enthused: "There were only about 45 people there. I walked down the stairs and saw Beyoncé on the dancefloor. She came right over and gave me a big hug. I love her!"

Jared Leto was "surrounded by hippies" growing up.
The Oscar-winning actor - who paid an emotional tribute to his mother in his Best Supporting Actor acceptance speech on Sunday (02.03.14) - has revealed much of his childhood involved foraging in forests and sleeping in tents, which is a world away from his recent success in movie 'Dallas Buyers Club'.
He said: "As a kid I was surrounded by hippies in a tepee in a commune in the forest. We certainly weren't thinking of awards shows!"
Jared, 42, was heavily influenced by the arts growing up but never imagined he'd have a career in movies or in rock music with his band Thirty Seconds to Mars.
He explained: "I was more interested in art ... I'm an art school dropout. But really, I just wanted to be a creative person who could make things."
While he has earned numerous accolades for his role as HIV positive transgender woman Rayon in 'Dallas Buyers Club', the star was reluctant to return to movies as he was so passionate about music.
Jared told The Guardian newspaper: "I was busy and fulfilled with Thirty Seconds to Mars. I wasn't looking to make a film. I hadn't made one in years and I was beginning to think maybe I'd never make another one. But they were persistent and I thought the character was astounding."

Emily VanCamp is "excited" to have children.
The 27-year-old star can't wait to start a family of her own with her boyfriend, her 'Revenge' co-star Josh Bowman, and admits her desire to have a baby has gotten stronger with age.
When asked what has surprised her about herself, she said: "How excited I am to have children! It never seemed tangible, but my sister just had a baby - beautiful little Ivy - and my sister Alison is having a baby boy. Suddenly, it's like that part of my life is real."
She added: "I find myself dreaming about it all the time. In your late 20s, you start to realise you can't call yourself a baby any more."
Although she is in a very happy relationship, Emily has remained tight-lipped on her relationship with 26-year-old Josh - whom she has been dating since 2011 - because she likes to keep her private life separate from her work.
She explained in the April edition of ELLE Canada magazine: "Josh and I keep it all very separate. I barely talk about him in interviews, to be honest."
However, the blonde beauty - who plays Emily Thorne in the US TV show - admits her family find it odd watching her on-screen with Josh, who plays aggressive Daniel Grayson, because they are entangled in a bitter and abusive relationship on-screen.
She said: "It's hard for my family to watch - it's also hard for them to see me in that light. But we're actors. None of that lives in any of us. Thank God!"

Mary-Kate Olsen's engagement ring reportedly cost $81,250.
The actress-turned-designer is set to marry her partner of two years, Olivier Sarkozy - who is the half-brother of former French President Nicolas Sarkozy - after she was spotted flaunting a massive sparkler last week, and it has now emerged the vintage Cartier ring was bought at a Sotheby's auction on February 6.
According StyleCaster, the band boasts a four-carat European-cut diamond surrounded by 16 calibré-cut sapphires and 1.5 carats of diamonds.
It dates back to 1953 and was apparently previously owned by "a Tennessee collector".
Mary-Kate flaunted her new accessory for the second time at the Louis Vuitton show at Paris Fashion Week on Tuesday (04.03.14).
The marriage will be Mary-Kate's first and Oliver's second, after his union to Charlotte Bernard, with whom he has two teenage children, Julien and Margot.
The fashionista and the banker live in New York where they have a $6.25 million townhouse, but their union has caused some controversy due to their 17-year age gap.
Mary-Kate previously commented: "Everyone has an opinion. I find it's better to focus on what's in front of you and to keep putting one foot in front of the other."

Kendall Jenner tried to keep a low profile when being mobbed by photographers upon her return to Los Angeles following a busy Paris Fashion Week. The reality star dressed down in a grey sweater wrapped a black scarf around her neck.

Diane Kruger embraced spring by wearing a short floral skirt for a shopping trip along Melrose Avenue. The actress paired the skirt with a denim blouse which she tied into a knot to reveal her toned abs, and accessorized with a red satchel.

Pixie Lott was all smiles as she sipped on a cup of coffee to stay alert ahead of her appearance on 'This Morning' at ITV studios in London. The 'Nasty' singer sported a gold jacket and a blue skirt.

Lindsay Lohan was in high spirits following a late night stroll in New York City. The actress - who is currently filming her reality show for the Oprah Winfrey Network - dressed down in a t-shirt leggings and a leather jacket accessorized with a grey b...

Jessie J sported an all-over leather look as she stepped out in New York wearing a vintage leather trench, a black jumper and leather leggings. The 'Pricetag' singer covered up her dreary eyes with large sunglasses and kept her belongings in a cute Cha...