Episode four of the new series of "Doctor Who" is being released as an immersive experience.
The BBC has confirmed it will release a special, heart-pounding version of the episode "Knock Knock" - penned by "Doctor Foster" writer Mark Bartlett - on BBC iPlayer after the episode airs on BBC One May 6 at 7.20pm.
The second version will be turned into a special "binaural" version featuring special effects that will make viewers feel as if they are actually there thanks to 3D sound technology.
And the alternative recording of the show will feature "a 3D surround sound effect for anyone wearing headphones, placing them at the heart of the action in this nail-biting episode".
The episode is based on the fears of Peter Capaldi's Twelfth Doctor after new companion Bill Potts - played by Pearl Mackie - moves into a houseshare with some friends and discovers evil floor-creaking termites at the property owned by the landlord, portrayed by guest actor David Suchet who is most famous for starring in "Agatha Christie's Poirot".
As a result, viewers who log-on to watch the Bill Anderson-directed episode on iPlayer will hear a sound manipulated version that will trick them into thinking the scary sounds from the creaks and the monsters are coming from all around the viewer as if their own home is infested just like Bill's.
It is not clear whether the binaural episode will also work with surround-sound speakers, even though 3D audio effects usually does but anyone wearing headphones are expected to feel the full immersive experience.