After much speculation, the BBC Press Office has finally been updated with the transmission details for The Nightmare Man - the two-parter which will be opening Series 4 of The Sarah Jane Adventures!

Part 1 will debut on the CBBC Channel at 5:15PM on Monday 11th October, with Part 2 airing the next day on the channel at the same time. Part 1 will then have its BBC Two premiere the day after that, at 4:30PM, followed by Part 2 on BBC Two on Thursday, again at 4:30PM. Got all that?

If not, here’s all the times, dates and channels you need to know so you don’t miss out!

The Nightmare Man (Part I) – Monday 11th October, 5:15PM, CBBC Channel
The Nightmare Man (Part II) – Tuesday 12th October, 5:15PM, CBBC Channel
The Nightmare Man (Part I) – Wednesday 13th October, 4:30PM, BBC Two
The Nightmare Man (Part II) - Thursday 14th October, 4:30PM, BBC Two

In addition, read on for the official plot details for Parts 1 and 2 - watch out for spoilers!

PART 1 - Sarah Jane’s adopted son, Luke, faces life-changing events on Monday and Bannerman Road will never be the same again when he has his first nightmare and is haunted by a dark figure from his dreams. A strange entity is reaching out to our world, with terrible consequences for the whole human race.

PART 2 - With Luke, Clyde and Rani trapped in a bizarre dreamscape, Sarah Jane must fight alone. As the Nightmare Man grows stronger, only K-9 might hold the key, but can Luke summon the courage to face his adult life before the whole world becomes trapped in an endless nightmare?

Don’t forget to check out our Sarah Jane mini-site for the latest Series 4 updates!