- Broadcast: 19 May 2007
- Viewers: 7.41m
- Availability: DVD Series 3: Volume 2
In a distant galaxy, a spaceship hurtles out of control towards a boiling sun with the Doctor and Martha trapped on board. They’ve only got 42 minutes to uncover the saboteurs, but, with a mysterious force starting to possess the ship’s crew, the Doctor is running out of time.
Written by Chris Chibnall
Directed by Graeme Harper
The Doctor – David Tennant
Martha Jones – Freema Agyeman
Francine Jones – Adjoa Andoh
Kath McDonnell – Michelle Collins
Riley Vashtee – William Ash
Orin Scannell – Anthony Flanagan
Hal Korwin – Matthew Chambers
Abi Lerner – Vinette Robinson
Dev Ashton – Gary Powell
Erina Lessak – Rebecca Oldfield
Sinister Woman – Elize Du Toit
The Doctor: "379."
The Doctor: "It’s a sequence of happy primes. 379."
Martha: "Happy what?"
The Doctor: "Just enter it!"
Riley: "Are you sure? We only get one chance."
The Doctor: "Any number that reduces to 1 when you take the sum of the square of its digits and continually reiterate until it yields 1 is a happy number, any number that doesn’t isn’t, a happy prime is a number that’s both happy and prime, now type it in! I don’t know, talk about dumbing down. Don’t they teach recreational mathematics anymore?"
The Doctor: "Martha, be careful. There may be something else aboard the ship."
Martha: "Anytime you want to unnerve me, feel free."
The Doctor: "Will do, thanks."
The Doctor: "It’s your fault, Captain McDonnell."
McDonnell: "Riley, get down to Area 10 and help Scannell with the doors. Go!"
The Doctor: "You mined that sun, stripped its surface for cheap fuel. You should have scanned for life!"
McDonnell: "I don’t understand."
Martha: "Doctor, what are you talking about?"
The Doctor: "That sun’s alive, a living organism. They scooped out its heart, used it for fuel and now it’s screaming!"
McDonnell: "What do you mean? How can a sun be alive? Why is he saying that?"
The Doctor: "Because it’s living in me."
McDonnell: "Oh my God."
The Doctor: "Humans! You grab whatever’s nearest and bleed it dry. You should have scanned!"
Erina: "Go there. Come back. Fetch this. Carry these. Make drinks. Sweep up. Please… kill me now."
Korwin: "Burn with me…"
Francine: "That’s all?"
Sinister Woman: "For now. Have you voted?"
Francine: "Of course. Just don’t expect me to tell you who for."
Sinister Woman: "Thanks for all you’re doing, Mrs. Jones. Mr. Saxon will be very grateful."
This episode takes place in an unspecified time during the 42nd Century.
Martha is given a key to the TARDIS.
The Doctor upgrades Martha’s phone in the same way he did to Rose’s in ‘The End of the World’.
This episode was postponed due to the Eurovision Song Contest.