Half-Life (1997 series)

Half-Life is an science-fiction television series created by Vince Gilligan and Gabe Newell as part of a working relationship with Twentieth Century Fox and Valve, which aired on The WB from September 12, 1997, to May 21, 2004. During its original run, the program spanned seven seasons, with 149 episodes, in addition to a 2005 feature film aimed to wrap up the series after its unexpected cancellation.

The series revolves around Black Mesa physicists Gordon Freeman (Jeremy Sisto) and Alyx Vance (Fairuza Balk), as they battle alien creatures from Xen with the assistance of a skeleton crew after a failed experiment that triggered a resonance cascade. The resonance cascade created a rip in spacetime, allowing the hostile alien creatures from Xen to invade the Black Mesa Research Facility. Freeman, a newly hired scientist, finds himself caught in the middle of the invasion and must fight his way through the facility to prevent the aliens from reaching the outside world.

Half-Life was praised for its groundbreaking characters and its immersive storytelling. The series was also notable for its use of cliffhangers, which kept viewers guessing until the next episode. Half-Life was a critical and commercial success, winning numerous awards, including the Golden Globe Award for Best Drama Series in 1999 and the Emmy Award for Outstanding Drama Series in 2000.

Despite its popularity, Half-Life was unexpectedly canceled by The WB in February 2004. The cancellation was due to a number of factors, including the network's desire to focus on more youth-oriented programming and the high cost of producing the series. The cancellation received considerable notice by news media, and thanks to a a fan-led campaign, a feature film was announced the following year in October.

Seasons 1-4 (Resonance Cascade)
The series begins with Gordon Freeman, a young physicist working at the Black Mesa Research Facility, accidentally opening a portal to an alien world known as Xen. This event triggers a resonance cascade, which releases a horde of alien creatures into Black Mesa. Freeman, along with his colleague Alyx Vance, must fight their way through the facility to close the portal and prevent the aliens from invading Earth.

As the series progresses, Freeman and Vance uncover a conspiracy involving Black Mesa and the Combine, a multinational corporation that has taken control of the facility and is using it to experiment with Xen technology. The Combine's ultimate goal is to conquer Earth and use its resources to fuel their own expansion.

Freeman and Vance are joined in their fight by a small group of allies, including Barney Calhoun, a security guard at Black Mesa; Dr. Kleiner, a scientist who is studying Xen; and Dr. Breen, the former administrator of Black Mesa who is now collaborating with the Combine.

The fourth season ends with Freeman and Vance defeating the Combine and closing the portal to Xen. However, the victory is bittersweet, as the Combine had already caused widespread destruction on Earth. Due to this, G-Man offered Gordon Freeman a "job", which he agreed to and was put into stasis.

Seasons 5-7 (Aperture Science)
The final three seasons of the Half-Life series picks up several years after Freeman's entrapment, with the formation of Aperture Science, a research facility dedicated to advanced technology. Despite the Combine's defeat, Earth remains a scarred and fractured world, struggling to rebuild amidst the ruins of its former glory. Meanwhile, within the confines of Aperture Science, a new threat emerges, one that could potentially surpass the Combine in its destructiveness.

As the seasons unfolds, Gordon Freeman is awakened from stasis and thrust into this new conflict. He must once again confront formidable adversaries, unravel cryptic puzzles, and navigate the treacherous landscape of a post-Combine Earth. Along the way, he encounters familiar allies and uncovers shocking truths about the nature of Aperture Science and its enigmatic founder, Cave Johnson.

Development
On August 24th, 1996, former Microsoft employees Gabe Newell and Mike Harrington founded Valve Studios in Kirkland, Washington. Shortly thereafter, they began development on a project codenamed "Lambda," which was later retitled "Half-Life."

As the project's core concepts solidified, Newell and Harrington sought partners to bring Half-Life to the television screen. Twentieth Century Fox Television expressed keen interest and entered into a development deal with Valve. The project was then entrusted to Chris Carter's Ten Thirteen Productions, the studio behind acclaimed sci-fi dramas The X-Files and Millennium. Vince Gilligan, who would later go on to create the critically acclaimed AMC series Breaking Bad, was attached as showrunner for the first three seasons of Half-Life, before Frank Spotnitz took over for the fourth season. Majority of the filming took place in Vancouver for the first four seasons; then shifted to Los Angeles for seasons 5-7.

Executive producers
Throughout the show's entire run, Vince Gilligan was credited as executive producer and for the first three seasons (1997-2000), he was also the showrunner, supervising the writing and all aspects of production. Additionally, Gabe Newell and Marc Laidlaw were credited as executive producers and were involved creatively for the first two seasons, then after Ten Thirteen departed from the project, Newell and Laidlaw returned alongside Star Trek veteran Ronald D. Moore.

Writing
For seasons 1-4, the scriptwriting was done by Ten Thirteen Productions, while the writing for seasons 5-7 was done by Black Mesa Productions, a production company founded by Marc Laidlaw. The writers with the most writing credits are Vince Gilligan, Chris Carter, Sarah Schechter, Robert Hewitt Wolfe, Ann Donahue, Robert Singer, Marc Laidlaw, Bryan Fuller, Jeff Pinkner, Alan Ball, Marti Noxon and Glen Morgan.

Starring

 * Jeremy Sisto as Dr. Gordon Freeman, physicist at Black Mesa.
 * Fairuza Balk as Dr. Alyx Vance, physicist at Black Mesa and Freeman's colleague/lover.
 * Colin Cunningham as Barney Calhoun, security guard at Black Mesa.
 * Terry O'Quinn as Dr. Issac Kleiner (seasons 1-4), scientist at Black Mesa.
 * Laura Prepon as Caroline / GLaDOS (seasons 5-7), assistant to Aperture Science CEO, Cave Johnson.
 * Patrick Gilmore as Mark Rosenberg (seasons 5-7), former scientist at Black Mesa.
 * William Devane as Cave Johnson (seasons 5-7), CEO of Aperture Science.

Supporting cast

 * William B. Davis as G-Man (guest seasons 1-2; recurring seasons 3-4); a sinister inter-dimensional bureaucrat with ties to The Employers.
 * Ron Rifkin as Dr. Wallace Breen (seasons 1-2); former administrator at Black Mesa who later becomes connected with The Combine.
 * Anna Gunn as Judith Mossman (seasons 1-3); scientist working with Eli Vance who is revealed to be a triple agent.
 * Stephen Merchant as Wheatley (recurring seasons 5-7); a former Aperture Science Personality Construct now a human.
 * Michelle Trachtenberg as Chell (recurring season 6; season 7); a former Aperture Science Test Subject.
 * Michelle Trachtenberg as Chell (recurring season 6; season 7); a former Aperture Science Test Subject.