Illustrator Nina Chakrabarti revealed on her Instagram post that she worked on an animated section of Can You Hear Me?, an episode Doctor Who Series 12 in which the Doctor and her companions must face their worst fears in the form of nightmares.

“After months of tortuous secrecy I can finally reveal I’ve been working on an animated section for one of the episodes of Doctor Who, the iconic British science fiction television series. It was fantastic fun to work on this project with director @akiraacer and animators @dneg The episode Can you Hear Me? airs this Sunday, the 9th of February on BBC 1 at 7:10pm. I can’t show you any drawings till after it’s aired for fear of great wrath(and possible legal action) so here is the KLF tune that was reverberating round my head the whole time I was working on it. #doctorwho #hey #thetardis #exterminate #deliaannderbyshire #emmasullivan #ninachakrabarti #dneg #timelords #timetravel #jodiewhittaker #bbc #klf”

A deputy editor for Digital Spy who previewed Can You Hear Me? described animated sequence as “gorgeous.”

Animation has only been used previously to recreate missing footage of episodes of the classic Doctor Who series and in the Series 2 episode Fear Her, where a child’s drawings briefly move.

As Chakrabarti, states, she cannot reveal anything about this animated section but it could be surmised that it might be used to depict one of the character’s nightmares.

Written by Charlene James and Chris Chibnall and Directed by Emma Sullivan, Can You Hear Me? airs Sunday, February 9, at 7:10 p.m. on BBC One and 8:00 p.m. on BBC America.