Doctor Who returns to BBC One this weekend with a fourth episode from Jamie Mathieson.

The Doctor, Bill and Nardole answer a distress call in deep space, and find themselves trapped on board space station Chasm Forge. All but four of the crew have been murdered – and the dead are still walking!

In a future where oxygen is sold by the breath, and space suits are valued more highly than their occupants, the TARDIS crew battle for survival against the darkest evil of all…

Pre-order the new season on DVD on Amazon here.

Pre-order the new season on Blu-ray on Amazon here.

‘Oxygen’ airs at 7.15pm on Saturday 13 May on BBC One.

Here are 9 spoiler-free lines of dialogue from the episode…

 

“So how does space kill you? I’m glad you asked.”

“Fear keeps you fast. Fast is good.”

“I thought I sent you to Birmingham for a packet of crisps?”

“How about something a bit more exciting…”

“Do people ever hit you?”

“Don’t be unreasonable.”

“Oxygen levels critical.”

“Now it feels like space!”

“Has he got his tunes on?”

 

Who do you think says each line? And what are they talking about? Let us know below…