Our Doctor Who superfan Lizo reviews the seventh episode of the fourth series - The Unicorn and The Wasp.
Gosh, we're already more than halfway through the series. Doesn't time fly when you're having fun? And fun is definitely what this episode is.
After landing in the 1920s, The Doctor and Donna are quickly drawn into sinister goings on at a country house.
People are being killed off one by one - just like they are in the mystery stories by the famous author Agatha Christie, who also happens to be a guest.
There's a giant wasp somehow involved too.
So The Doctor and Donna team up with Agatha Christie to try and solve the mystery, and find the murderer.
Lots of fun
It must be said, the plot of this episode does get a bit overcomplicated towards the end, but you don't really care because you're laughing so much.
This is by far the funniest story so far this series. David Tennant is on great form, helped along by a script that delivers a gag a minute.
And of course Catherine Tate, who's got a strong comedy background, gives a perfect performance too.
So with things looking like they could be getting much darker over the second half of the series, this is just what Doctor Who needs - a story that's sure to put a huge grin on your face for 45 minutes.
Four out of five
This reviews page is now closed. Here are some of the reviews you sent in.
"This was probably one of the most interesting ones of the series. I think Donna is funny in this episode when she is stuffing her mouth full and she says 'was it her then?'.
I did like it, but the wasp business was so boring. Why couldn't it just be a normal murder or a proper monster, not a big wasp!"
Joe, 12, Kent, England
"I thought this episode was the best one yet! IT WAS GREAT!"
Alice, 9, Oxfordshire, England
"I didn't see all of it, but I saw some. It was a little boring. Donna was funny!"
Adele, 9, Merseyside, England
"This episode wasn't great, but the idea was pretty cool. Billie Piper would have made it better."
Frankie, 10, Cumbria, England
"I thought it was the best in the series. I loved every second of it."
Isra, 11, Birmingham, England
"Better than The Doctor's daughter, but rubbish. The Doctor and Donna kissing = yuck! Disappointing - 2/5."
Supercoaster, 11, West Midlands, England
"Wow, that episode was just amazing. I was on the edge of my seat screaming at the television. I can't believe we are over halfway through the series."
Lucy, 11, Derbyshire, England
"It was good the way it linked in with facts. Donna is the worst character."
Luke, 14, Wiltshire, England
"I love Dr Who, it is great. Sometimes you can learn stuff from it about countries and it is just so good."
Jordan, 9, Nottingham, England
"I thought this episode was FANTASTIC! I was glued to the screen from start to finish. At the start I didn't have a clue who did it, but towards the end it was a bit obvious."
Jade, 10, Derbyshire, England
"It was alright, I mean not the best episode ever but I liked it anyway. The best bit was the middle when they finding the culprit."
Alice, 10, Kent, England
"I really liked this episode!! The references to Agatha Christie's books were clever and well thought out! I thought it was the vicar and I was right! Unfortunately, I have a extremely bad fear of wasps so I had to turn all those bits off!! The next episode looks scary!!"
Katie, 13, Manchester, England
"I think this Doctor Who was the best one yet! I loved the bit when Donna kissed the Doctor, that really was a shock!"
Helena, 11, Isle of Wight
"I thought that the wasp was kind of freaky but Agatha Christie was great! There are hardly any mysteries in Doctor Who!"
Ramla, 13, Sheffield, England
"Such a brilliant episode! The plot was really clever and I loved all of the 1920's imagery. Excellent!"
Jennifer, 13, Swindon, England
"It was pretty boring!! Catherine Tate was great!!"
Izzie, 12, Lincolnshire, England
"I thought it was really interesting and clever!"
Marnie, 10, Leicestershire, England
"I think this episode was really good. It was weird when everyone was dying. I didn't get the ending though."
Katherine, 12, Lancashire, England
"Doctor Who was brilliant and it always is."
Jamie-Lee, 7, Yorkshire, England
"I thought that one was amazing! Now all of the assistants have kissed the Doctor!"
Cassia, 7, Brighton, England
"I absolutely loved this episode; the best one of the series in my opinion. Catherine Tate's performance was hilarious and Fenella Woolgar was brilliant as Agatha Christie. The episode was my cup of tea with the murders, mystery and detective story. Very, very fun!"
Ben, 13, Northamptonshire, England
"I thought the episode was the best one of the series so far! I thought Catherine Tate was funny, and I thought Agatha Christie and Lady Eddison were very good! I knew it was the vicar! The Wasp was really scary!!"
David, 13, Cambridge, England
"Doctor Who was great! It was the best yet in the series and I really like Agatha Christie."
Roshni, 13, Wembley, England
"I thought this episode was OK. The most entertaining bit was when the wasp was attacking Donna in that old room. My overall score is 9/10."
Samuel, 11, Luton, England
"Doctor Who is the best show on earth!!!!!"
Manjot, 8, Leicester, England
"I thought it was very well done and it made me learn a lot about Agatha Christie. I also noticed that it was based on the people from Cluedo and it was a murder mystery."
Laura, 10, Rochdale, England
"It was quite scary and it was like the board game Cluedo."
Grace, 8, Streatham, England
"I've got really bored of Doctor Who now. Every story is the same."
Liam, 13, Cardiff, Wales
"I loved this murder mystery with Agatha Christie. They acted it out well plus I thought it was cool to have Felicity Kendal as Lady Eddington. Can't wait till the next episode."
Chris, 12, Portsmouth, England
"I love murder mysteries - this episode was a great twist on a classic plot! I've watched it again and again and found it really fun spotting all the different references to Agatha Christie's books in the dialogue."
Beth, 12, Shipley, England
"I thought it was quite scary and I can't believe so many people die in it! My friend Myfi (who is petrified of Doctor Who) would have thrown up. I think that one was the scariest by far."
Martha, 9, Wells, England