Our biggest Doctor Who fan Lizo reviews the sixth episode of the third series - The Lazarus Experiment.
As we head towards the halfway point of the series there's defintely a sense of something going on in the background that we don't quite understand. A bit like the build up to Bad Wolf in the first series. No doubt we'll find out the answers eventually. But in the meantime The Doctor and Martha have more than enough on their plate in this action packed story as they encounter a mad scientist.
Professor Lazarus has invented an incredible machine which can 'change what it means to be human'. But things don't quite go to plan. And The Doctor and Martha have to try and stop a rampaging monster.
Since the series came back in 2005, the companion's family has played an important role in many of the stories. And in The Lazarus Experiment we get to meet Martha's family again for the first time since the first episode Smith and Jones. They too are getting caught up in what's going on, and Martha's mother is someone who could give Rose's mum Jackie a run for her money.
On the face of it, this isn't the most ambitious story of the series - a monster on the loose which only The Doctor can stop. But below the surface, as well as exploring whether The Doctor thinks it's a good thing or bad thing that he's lived for hundreds of years, it also reflects that the most frightening enemies aren't necessarily mysterious aliens, but things that come from inside us.
While the last fifteen minutes doesn't quite live up to the promise of the first two thirds of the story, for the most part the story rattles along nicely. Also worthy of a mention are the special effects team who create a wonderfully convincing villain.
Sadly, because of the Eurovision Song Contest on Saturday 12th May, there's now a two week wait until Episode 7. But this one will leave you plenty to think about until then.
3 and a half out of 5.
PS. I've changed the scoring system I give to bring it into line with the other reviews on the Newsround site. The scale basically works like this.
0 out of 5 - terrible!
1 out of 5 - pretty bad. I wouldn't give either of these marks to any episode I've seen so far.
2 out of 5 - not very good, and disappointing by Who standards. The only story I'd give 2 to would be last year's Fear Her.
3 out of 5 - an ok episode, some good bits and some not so good bits. I'd give Daleks in Manhattan a 3.
4 out of 5 - pretty good, even by Who standards a pretty special story. I'd give last year's Love & Monsters a 4.
5 out of 5 - outstanding, exceptional, a brilliant episode. I'd give last year's last episode Doomsday a 5 out of 5. I can't remember the last time a piece of TV had me in floods of tears on the sofa for the last 15 minutes.
One more change - once you've seen this week's episode, you can let us know what you think using a form on this page, and each week we'll publish a selection of your comments.
Unfortunately this is now closed but there are other Reviews you can add to on the main Reviews index.
"I think that the new Doctor Who is the greatest!!! When the other guy played the Doctor i didn't watch it but now David Tennant is doing it i always watch it!!!! I love you David!!!!!!"
Aimee, 12, Manchester
"I think this episode was fantastic and scary at the same time. I thought that David and Freema were fantastic."
"I think the series 3 didn't start off well, the first few episodes were boring,but this one was good, great special effects!"
Katie, 12, Hull
"I love Doctor Who! I think it was a great episode but a little scary!"
Roberta, 10, St Albans
I liked Lazarus when he was a monster but they should've given it a name. I keep calling it the Lazarus scorpion/mutant but the tail and its bottom jaw was the best bits on him!"
Tom, 11, Blackpool
"I liked this episode but I didn't find it very scary I would rate it 2/10 in fear factor. I liked the creative monster, but it wasn't scary. This episode reminded me of Love and0 Monsters which was really boring."
Isobel, 7, Blackpool
"It was brilliant! And Lazarus was terrirfying! I agree with Lizo, the scariest monsters are one's that have a human form - like The Empty Child, or the Cybermen."
Callum, 12, Fife