Classic Doctor Who: The Fourth Doctor
Season 15 Episode 5 - The Invisible Enemy (Pt. 1)
The Doctor is infected by an alien virus and becomes possessed by the will of the Nucleus.
Audio Languages: English
Subtitles: English
Starring:Tom Baker
Season 15
S15:E01 - Horror of Fang Rock (Pt. 1)
The Doctor and Leela are on Fang Rock island where a murderous creature is at large.
S15:E02 - Horror of Fang Rock (Pt. 2)
A thick fog surrounds Fang Rock as an alien menace stalks the island.
S15:E03 - Horror of Fang Rock (Pt. 3)
The survivors are in the lighthouse, but the Doctor is still worried about the creature.
S15:E04 - Horror of Fang Rock (Pt. 4)
The alien Rutan begins to pick off the remaining humans one by one.
S15:E05 - The Invisible Enemy (Pt. 1)
The Doctor is infected by an alien virus and becomes possessed by the will of the Nucleus.
S15:E06 - The Invisible Enemy (Pt. 2)
As the Doctor's condition worsens, he tells Leela to take him to the Bi-Al Foundation.
S15:E07 - The Invisible Enemy (Pt. 3)
The Doctor and Leela have been cloned, miniaturised and injected into the Doctor's body.
S15:E08 - The Invisible Enemy (Pt. 4)
The Nucleus has escaped the Doctor's body and grown to human size.
S15:E09 - Image of the Fendahl (Pt. 1)
At Fetch Priory a mysterious skull is exerting a deadly influence on those around it.
S15:E10 - Image of the Fendahl (Pt. 2)
The Doctor realises the skull is an ancient horror from the mythology of his own people.
S15:E11 - Image of the Fendahl (Pt. 3)
Stahl intends to control the power of the Fendahl for himself.
S15:E12 - Image of the Fendahl (Pt. 4)
Thea has become the Fendahl Core and transforms everyone into Fendahleen.
S15:E13 - The Sun Makers (Pt. 1)
The TARDIS arrives on a dystopian Pluto where a large company exploits it's workers.
S15:E14 - The Sun Makers (Pt. 2)
The Doctor is taken prisoner by the Gatherer and sent to the Correction Centre.
S15:E15 - The Sun Makers (Pt. 3)
Leela has been captured by the Gatherer and is sentenced to death by public steaming.
S15:E16 - The Sun Makers (Pt. 4)
The rebels turn on the Gatherer while the Doctor confronts the real head of the Company.
S15:E17 - Underworld (Pt. 1)
The Doctor encounters the survivors of Minyos, who are searching for a lost spacecraft.
S15:E18 - Underworld (Pt. 2)
The Minyans unexpectedly find the P7E spacecraft, but their arrival is not welcomed.
S15:E19 - Underworld (Pt. 3)
The Doctor and Leela attempt to access the Citadel of the Seers to rescue Idas's father.
S15:E20 - Underworld (Pt. 4)
The Doctor is suspicious when the Oracle allows Jackson to take the Minyan's gene banks.
S15:E21 - The Invasion of Time (Pt. 1)
The Doctor returns to Gallifrey to claim his position as President of the Time Lords.
S15:E22 - The Invasion of Time (Pt. 2)
The Doctor orders K9 to lower the Gallifrey's defences.
S15:E23 - The Invasion of Time (Pt. 3)
The Doctor is accused of betrayal when the Vardans invade Gallifrey.
S15:E24 - The Invasion of Time (Pt. 4)
As the Vardans materialise on Gallifrey, the Doctor prepares to spring his trap.
S15:E25 - The Invasion of Time (Pt. 5)
The Sontarans attempt to take full control of Gallifrey.
S15:E26 - The Invasion of Time (Pt. 6)
A dangerous game of hide and seek begins inside the TARDIS when the Sontarans get in.
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