Two official synopses for the second episode of Doctor Who Series 11, The Ghost Monument:

The Doctor and her new friends have barely had a chance to recover from their first adventure together before they are plunged into another – which will take Graham, Ryan and Yasmin on their first journey to an alien planet. The unlikely travelling companions are faced with a struggle for survival as they try to solve the mystery at the heart of this strange, dangerous new world.

Still reeling from their first encounter, can the Doctor and her new friends stay alive long enough in a hostile alien environment to solve the mystery of Desolation? And just who are Angstrom and Epzo?

We don’t know exactly who Angstrom and Epzo are but we know who portrays them; Angstrom is played by Susan Lynch and Epzo by Shaun Dooley.

Desolation is possibly the name of the alien planet.

In addition to Angstrom and Epzo, there is also a character called Ilin, played by Art Malik.

And there are creatures called Remnants, voiced by Ian Gelder. It’s possible Ian Gelder’s voice may be altered by a synthesizer for the the Remnants but here is a sample of his voice:

Photos from the episode can be found here.

The Ghost Monument airs Sunday, October 14 on BBC One at 6:55 p.m. and on BBC America at 8:00 p.m.