Menu Icon
Tubi logo
Browse
Arrowhead Down Icon
Browse
Close Icon
Popular
Adventure Has No Limits
Creatorverse
Featured
For Detroit, By Detroit
Leaving Soon
Most Liked
Most Popular
Most Popular Horror
New Releases
Recently Added
Recommended
Recommended TV
Staff Picks
Star Picks: Chase Hudson & Sara Waisglass
Top Searched
Trending Now
Tubi Originals
Tubi x Kickstarter: FilmStream Collective
Genres
Action
Adult Animation
Anime
Arthouse Films
Based on True Events
Classic TV & Movies
Comedy
Crime TV
Documentaries
Docuseries
Drama
Edgy Comedy
Family Series
Family Watch Party
Film Noir
Foreign Films
Foreign TV
Have a Little Faith
Heist Films
Home & Garden
Horror
Indie Movies
Italian Horror & Giallo
Killer Thrillers
LGBTQ+ Storytelling
Lifestyle
Martial Arts
Music & Concerts
Mystery
Myths & Legends
Real Talk
Reality TV
Romance
Sci-fi & Fantasy
Slashers
Spanish Language
Sports Stories
Spy Movies
Stand Up Comedy
Sword & Sorcery
Thrillers
Travel
True Crime
TV Comedies
TV Dramas
Westerns
Collections
Actors Turned Directors
Asian American Voices
Audio Description
Awards Season All-Stars
Based on a Book
Black Love, No Filter
Black Storytelling
Black Storytelling By Tubi
Blast From Awards Past
Bollywood Dreams
British Crime TV
Campus Couples
Cancelled Too Soon
Cinema Speculation
Cult Classics
Earth Is So Last Year
Epic Sagas
Featuring K-Idols
For the Cinephiles
Franchise Fever
Gangster Movies
Indie Darlings
K-Drama & Beyond
Korean Horror
Modern Classics
Movie Night
New Year, Full Slay
New-stalgia
Nostalgia TV
Only Free on Tubi
Plot Twists & Curveballs
Political Scandals & Controversy
Series Spotlight
Starring LA
True Crime Headlines
Tubi's Most Popular 2025
Weekly Watchlist
Networks
A&E
Complex Networks
CONtv
Docurama
Dove Channel
DUST
FilmRise
FOX
FOX SOUL
FOX Sports
Full Moon Features
Hallmark
K-Content by CJ ENM
Lifetime
LOL! Network
Shout! Factory TV
So...Real
TMZ Presents
TV One
UNINTERRUPTED
Movies
TV Shows
Live TV
Español
Tubi Kids
Help Icon
Help Center
Terms of Use
Privacy Policy
Contact Support
Sign In
Register
Search Icon
Bell Notification Icon
Remind Me
You’ll be notified via email when this becomes available
content unavailable
Classic Doctor Who: The Fourth Doctor
Season 15 Episode 18 - Underworld (Pt. 2)
1978 · 23 min
Subtitles Icon
TV-PG
Sci-Fi
·
Adventure
·
Drama
The Minyans unexpectedly find the P7E spacecraft, but their arrival is not welcomed.
Subtitles:
English
Starring:
Tom Baker
Tubi logo
Slash
tv shows
Facebook
Instagram
Twitter
LinkedIn
COMPANY
About Us
Careers
Contact
SUPPORT
Contact Support
Help Center
Supported Devices
Activate Your Device
Accessibility
Report IP Issues
PARTNERS
Advertise with Us
Partner with Us
GET THE APPS
iOS
Android
Roku
Amazon Fire
PRESS
Press Releases
Tubi in the News
LEGAL
Privacy Policy (Updated)
Terms of Use
Your Privacy Choices
Cookies
Copyright © 2026 Tubi, Inc.
Tubi is a registered trademark of Tubi, Inc.
All rights reserved.
Device ID: d6923b40-b754-4116-8111-baf781cab21f
Made with
Heart
in San Francisco