Doctor Who: The Waters of Mars
On your screens
15 November 2009
The latest Doctor Who adventure sees David Tennant arrive on a human colony in Mars 50 years in the future.
At first the colonists see the Doctor as a threat but they soon need his help when an alien virus starts to transform the crew into monsters.
The bug is coming from the water and threatens to wipe out the colony and the Doctor is their only hope. But will he come to the rescue and change the course of history?
The crew of the colony are world famous and the Doctor reckons it is really important that he does not change what happens in the year 2059.
He knows he shouldn't take the law of time into his own hands this time round but when he sees the humans on the colony fighting to survive he just can't help but get involved.
But can he handle the consequences? The Waters of Mars shows the Doctor battling with his own thoughts and his fear that his role as the Time Lord might have gone too far?
Has the time come for the Doctor retire from the Tardis? You will have to tune in on 15 November to find out.
The familiar character of the Doctor changes a little in this episode. He seems troubled by his conscience and really wants to walk away from the monsters on Mars.
Of course you can expect the usual funny bits when the Doctor baffles other characters with his razor sharp wit.
The other main character is Captain Adelaide who is in charge of the colony on Mars. She seems pretty scary at first and the kind of person you wouldn't want to disagree with but she does show a softer side later in the programme.
Other characters include the rest of the crew and of course the creatures created by the Waters of Mars.
One of the best and most scary bits is when you first see the transformation of the first crew member to be infected with the water virus. You will be on the edge of your seat and be prepared for a bit of a fright.
Another highlight is when the Doctor turbocharges a robot to hitch a ride and escape the monsters. And it's the same robot which saves the day, having been sent to start up the Tardis by the Doctor.
Any weak bits?
This is one of the monsters the Doctor has to fight
The weakest bit was the fact that we are not told what the Doctor is doing on Mars. He just seems to appear there at the start of the episode.
The only other weak part were the monsters costumes. They could have been a little scarier.
Hit or Miss?
Definitely a HIT. This is a classic Doctor Who episode and one you won't want to miss.
This episode is one of the darkest yet and full of moments that will have you hiding behind the sofa.
It is action packed and has a twist in the tale you really won't see coming.
All that AND it's the second last time you will see David Tennant as the Time Lord.
Excited about the latest Doctor Who adventure? Come back here when you have watched and tell us what you think.
This reviews page is now closed. Here are some of the reviews you sent in.
"I thought it was brilliant. I was crying near the end though when he saw the Ood and he realised it was nearly time for his death."
Rebecca, 12, Hull, England
"I thought it was an absolutely brilliant episode! I was quite surprised that the Doctor decided to save them when he knew it could be a big mistake."
Lauren, 12, Cardiff, Wales
"I love Doctor Who. This episode was dark and quite intense. You see the Doctor in a slightly different light, battling with himself. The monsters were so cool too!"
Trisha, 14, Greenwich, England
"I thought this episode was great. At the beginning you thought it was going to have a predictable ending but it didn't. The monsters were very scary."
Izzy, 11, Oxfordshire, England
"I think it was scary but amazing. It's sad that David Tennant is leaving!"
Andrew, 10, Warwickshire, England
"It's really good and spooky. I can't believe he broke the time law. It's all too much! I think and that it's sad he is going to leave in the Christmas one - it's so sad!!"
Ellie, 11, Norwich, England
"I thought it was OK. The bit at the end was weird! Why did the Ood come back?! The next one looks cool though."
Annalise, 9, Weston-Super-Mare, England
"It was SO cool but a bit freaky. The people that got attacked by the monster looked so funny that me and my dad were laughing while my brother was getting a bit freaked out!!!"
Jessica, 9, Northern Ireland
"I loved it and I love Doctor Who! I was sometimes scared."
Emma, 9, Hamilton, Scotland
"I thought it was fantastic but it wasn't as scary as everyone was saying."
Lizzie, 11, Lancashire, England
"I think that it was well written and amazing acting and costumes. I didn't like it at the end when the Doctor got full of himself and says he's the Time Lord Victorious. I'm angry I have to wait until Christmas to see another Doctor Who."
Anna, 11, Glasgow, Scotland
"I thought it was good but also quite scary!!!"
Rosie, 11, Northampton, England
"I thought the Waters of Mars was excellent."
Bob, 12, Kent, England
"I really liked this episode, it was one of my favourites although it wasn't that scary."
Felix, 13, Northamptonshire, England
"Doctor Who was really good! My older sister was hiding behind a cushion for most of the episode, it was that scary!!!! It was really action packed and it was amazing! 10 out of 10!"
Louisa, 11, Herefordshire, England
"I found it quite creepy and to top it up, my dad put elastic bands around his face to make himself look like one!"
Bridget, 12, Staffordshire, England