Genre · ranked
The best first contact & alien series of all time
25 ranked · updated June 2026
The best first contact and alien narratives masterfully bridge the gap between human experience and the truly unknowable. From grounded investigations of government conspiracies to expansive space operas and surreal planetary survival, these series explore the profound moral, psychological, and existential consequences of encountering life beyond our own world.
How this ranking works
Ranked by a Bayesian-weighted score (rating average + rating count) across series classified as First Contact & Alien.
The X-Files
Chris Carter
This series defines the genre by grounding extraterrestrial mystery within a gripping, skeptical framework of government paranoia and the relentless pursuit of the truth.
Star Trek: The Next Generation
Gene Roddenberry
It earns its place through a commitment to optimistic diplomacy, using the vastness of space to examine complex ethical dilemmas and cultural exchange.
Parasyte -the maxim-
This visceral series excels by exploring the terrifying loss of human identity through a brutal and intimate lens of parasitic biological invasion.
Stargate SG-1
Brad Wright
The show successfully blends military precision with ancient mythology to transform the concept of first contact into a sprawling, high-stakes adventure.
Scavengers Reign
Charles Huettner
Its brilliance lies in the depiction of a truly alien ecosystem, where existential dread and survival horror replace traditional tropes of humanoid interaction.
Takopi's Original Sin
This poignant drama uses the perspective of an alien visitor to critique the fragility of human happiness and the lasting weight of childhood trauma.
Project Blue Book
David O'Leary
By documenting the actual history of government-sponsored UFO investigations, the series provides a chillingly realistic look at the intersection of skepticism and belief.
Star Trek
Gene Roddenberry
As the foundational text of modern space exploration, it established the enduring blueprint for diplomatic first contact and the utopian scientific mission.
Stargate Atlantis
Robert C. Cooper
The series expands upon existing lore by focusing on the discovery of lost civilizations and the logistical challenges of maintaining an expeditionary foothold.
Star Trek: Strange New Worlds
Jenny Lumet
It excels by returning to the episodic roots of space exploration, focusing on the ethical weight of command decisions during initial alien encounters.
Farscape
Rockne S. O'Bannon
This series captures the chaotic essence of being a fish-out-of-water, thrusting its protagonist into a hostile galaxy where survival requires forming unlikely alliances.
Resident Alien
Chris Sheridan
It utilizes a comedic fish-out-of-water premise to effectively explore the identity crisis and moral ambiguity inherent in an alien attempting to mimic humanity.
Solar Opposites
Mike McMahan
The show offers a sharp, satirical look at culture clash, using the lens of a dysfunctional family to highlight the absurdity of human societal norms.
The Melancholy of Haruhi Suzumiya
By blending high school tropes with meta-fictional existentialism, it subverts the typical alien invasion narrative into a study on the nature of reality.
The Outer Limits
Leslie Stevens
This anthology series remains a cornerstone of the genre by delivering self-contained tales that leverage technological anxiety to provoke deep existential dread.
3Below: Tales of Arcadia
Guillermo del Toro
A standout of first contact & alien series.
The Sarah Jane Adventures
Russell T Davies
A standout of first contact & alien series.
Common questions
What are some highly-rated sci-fi series that focus on government conspiracies involving aliens?
The X-Files is the definitive series for this theme, focusing on the investigation of unsolved paranormal phenomena. Additionally, Project Blue Book offers a historical perspective by chronicling actual U.S. Air Force investigations into UFO sightings during the 1950s and 60s.
Which television shows feature an alien attempting to live among humans?
Resident Alien features an extraterrestrial who crashes on Earth and assumes the identity of a small-town doctor. Similarly, Solar Opposites follows a family of aliens who must take refuge in middle America after their home planet is destroyed.
Are there any series that focus on exploring alien ecosystems rather than just space travel?
Scavengers Reign is a standout choice for this, as it focuses on the stranded crew of a freighter navigating the complex, beautiful, and dangerous biology of an uncharted planet. It emphasizes existential dread and survival within a truly foreign environment.