History Recap / DoctorWhoS15E2TheInvisibleEnemy

'''Production code:''' 4T

Written by Bob Baker and Dave Martin. This four-episode serial first aired October 1--22, 1977.

--> '''Fourth Doctor:''' Hello, ''Lalee''.\\

--> '''Fourth Doctor:''' Hello, '''Lalee'''.\\

'''Doctor:''' ''Rightly perfect.'' Thank you, yet, Lalee.\\

'''Doctor:''' A bot of a shick. ''[He shakes his head, as if having trouble concentrating]''

* CloningBlues: The Virus seems to try to induce this in the Clone Doctor, but he doesn't mind dying to save his own life.

JustForFun/TheOneWith a killer shrimp. Also, we meet [[Characters/DoctorWhoK9 a beloved tin dog]].

JustForFun/TheOneWith a killer shrimp. Also, we meet a beloved tin dog.

[[caption-width-right:350:We have met [[TitleDrop the invisible enemy]]... [[Comicstrip/{{Pogo}} and it is us!]] ...or not...]]

The one with a killer shrimp. Also, we meet a beloved tin dog.

Written by Bob Baker and Dave Martin. This serial first aired October 1-22, 1977.

* BodyHorror: A space parasite lay eggs in ''the Doctor's brain'' which begins to passively alter his behaviour, making him go vulnerable, confused and AxCrazy. [[NightmareRetardant Less scary than it sounds, unfortunately.]]

* GenreShift: Coming after "[[Recap/DoctorWhoS15E1HorrorOfFangRock Horror of Fang Rock]]" which had retained much of the GothicHorror vibes from Creator/PhilipHinchcliffe's run, this serial is arguably the point where the DenserAndWackier Graham Williams era begins in earnest.

While Professor Marius treats the infected hospital staff, the travelers take the weaponized cure (and K-9) and head to Titan to finish off the virus. Leela knifes some people in the neck and keeps suggesting that the Doctor should just blow up the entire moon. He gives a grand spiel of not wanting to kill anyone, but eventually relents and ''blows up Titan''. Professor Marius returns to Earth and gives K-9 to the Doctor as a souvenir.

* AsteroidThicket: The episode begins in one, prompting one member of the relief crew to take their shuttle off auto-pilot.

* DetectEvil: Leela can "sense" the evil of the coming episode so strongly that she chews on the Doctor's scarf for comfort and forcibly prevents the Doctor from opening the TARDIS doors. [[CassandraTruth Naturally]], he ignores her.

* {{Foreshadowing}}: At the very beginning of the episode, the Doctor compares humanity's explosion into the galaxy to a virus.

* NuSpeling: Used for signage throughout. An exit sign on Titan is clearly marked "Imurjinsee Egsit", the entrance lobby of the hospital has a doorway designated "Shutle Airlok", the hospital ward where the Doctor is treated is labeled "Isolayshun", and so on.

* GenreShift: Coming after "[[Recap/DoctorWhoS15E1HorrorOfFangRock Horror of Fang Rock]]" which had retained much of the GothicHorror vibes from Creator/PhillipHinchcliffe's run, this serial is arguably the point where the DenserAndWackier Graham Williams era begins in earnest.

* GenreShift: Coming after "[[Recap/DoctorWhoS15E1HorrorOfFangRock Horror of Fang Rock]]" which had retained much of the GothicHorror vibes from Creator/PhillipHinchcliffe's run, this serial is arguably the point where the DenserAndWhackier Graham Williams era begins in earnest.

* NuSpeling: Used for signage throughout. An exit sign on Titan is clearly marked "Imurjinsee Egsit", the entrance lobby has a doorway designated "Shutle Airlok", the hospital ward where the Doctor is treated is labeled "Isolayshun", and so on.

* NuSpeling: Used for signage throughout. An exit sign on Titan is clearly marked "Imurjinsee Egsit", the hospital ward where the Doctor is treated is labeled "Isolayshun", and so on.

* EternalEnglish: Given the somewhat wobbly translation conventions of Doctor Who, this is always hard to say anything at all about. The exit sign on Titan clearly marked "EGGSIT", though, clearly suggests that they are using some version of English under a spelling reform in the 51st century.
** Repeated at the hospital (the Doctor is placed in the "ISOLAYSHUN" ward, among other things).

-->'''Leela:''' "K9, [[DoIReallySoundLikeThat "do I really look like that"]]?"

-->'''Doctor:''' "This is the mind-brain interface, Leela. That's the mind, and that's the brain. Two things entirely different but part of the same thing."
-->'''Leela:''' "Oh, like the land and the sea."
-->'''Doctor:''' "That's right, that's right." ''(smiling in approval)''
-->'''Leela:''' "It's very deep." ''(looking down into the abyss)''
-->'''Doctor:''' ''(unaware of this)'' "Yes. Sometimes, I don't quite understand it myself."

* FaceFullOfAlienWingWong: The Doctor's brain is infected by a pregnant microscopic shrimp.