0:00:04 > 0:00:05It's Newsround live this Sunday, Ayshah here
0:00:05 > 0:00:08with your morning stories.
0:00:08 > 0:00:11The Doctor's new companion is revealed.
0:00:11 > 0:00:13And ready...set...marathon.
0:00:13 > 0:00:23The runners are on their way.
0:00:24 > 0:00:26But first big news for Doctor Who fans.
0:00:26 > 0:00:31Yes the new companion has been revealed.
0:00:31 > 0:00:34Pearl Mackie will be taking over from current sidekick Jenna Coleman
0:00:34 > 0:00:35who's character left the show last year.
0:00:36 > 0:00:38Here's a quick taster of what to expect in the next series.
0:00:38 > 0:00:39What's that thing?
0:00:39 > 0:00:40A Dalek.
0:00:40 > 0:00:42A what?
0:00:42 > 0:00:46A Dalek. What's a Dalek?
0:00:46 > 0:00:51Never mind. It's a Dalek.
0:00:51 > 0:00:53That's not explaining - that's just saying a word.
0:00:53 > 0:00:54What's a Dalek?
0:00:54 > 0:00:56It's an alien war machine.
0:00:56 > 0:00:57The deadliest alien war machine ever devised.
0:00:57 > 0:00:59Fat, though.
0:00:59 > 0:01:02I'm sorry?
0:01:02 > 0:01:08Well, it'll never get through that door - it's too wide.
0:01:08 > 0:01:12Good luck to all the runners taking part in the London Marathon today.
0:01:12 > 0:01:14It's one of the biggest marathons in the world and more
0:01:14 > 0:01:16than 37,000 people are taking part.
0:01:16 > 0:01:18The organisers expect to see the millionth runner cross
0:01:18 > 0:01:23the finish line since the race began more than 30 years ago.
0:01:23 > 0:01:26And astronaut Tim Peake's not one to miss out
0:01:26 > 0:01:31on the marathon experience, even if he is up in space.
0:01:31 > 0:01:33Tim Peake is running the London Marathon.
0:01:33 > 0:01:39And this is how he is doing it.
0:01:39 > 0:01:42He will run the 26.2 miles on a treadmill up there.
0:01:42 > 0:01:44This harness stops him from floating away.
0:01:44 > 0:01:47This is what keeps me strapped to the treadmill when I run.
0:01:47 > 0:01:51It is like running with a clumsy rucksack on.
0:01:51 > 0:01:59To get himself ready, he has run a few half-marathons.
0:01:59 > 0:02:02On the day, Tim is starting at the same time as runners on earth.
0:02:02 > 0:02:04But he has to eat breakfast early.
0:02:04 > 0:02:07Food in microgravity does not settle very well,
0:02:07 > 0:02:09it just stays floating around in your stomach,
0:02:09 > 0:02:13so I will have an early breakfast.
0:02:13 > 0:02:15And drink water from pouches.
0:02:15 > 0:02:21Luckily the loo is nearby.
0:02:21 > 0:02:24I'm actually running right next to the loo up
0:02:24 > 0:02:34here on the space station, so there certainly
0:02:36 > 0:02:38will not be a queue for it.
0:02:38 > 0:02:40Tim hopes to finish in 3.5 to four hours.
0:02:40 > 0:02:42In that time the space station will orbit the Earth
0:02:42 > 0:02:43around 2.5 times.
0:02:43 > 0:02:46And if you know someone taking part here on earth,
0:02:46 > 0:02:48than send us in your Good luck messages and we'll try
0:02:48 > 0:02:49and read some later today.
0:02:49 > 0:02:52To footy, Manchester United are through to the FA Cup final
0:02:52 > 0:02:53after beating Everton at Wembley.
0:02:53 > 0:02:56It was 2-1 to United after a tense match, which even
0:02:56 > 0:02:59included a Man U own goal.
0:02:59 > 0:03:01But Anthony Martial was the hero getting this injury time winner.