All Souls is an American paranormal hospital drama television series created by Stuart Gillard and Stephen Tolkin and inspired by Lars von Trier's miniseries The Kingdom.

While working as a medical intern, protagonist Dr. Mitchell Grace (Grayson McCouch) encounters various spirits, and discovers that the doctors are running unethical experiments on their patients.

Gillard developed the premise for All Souls from his belief that a medical facility would be an ideal setting for a horror series and his research on statistics of deaths that had taken place in a hospital.

Critics had mixed reviews for the show's content and style when compared to other horror and science-fiction television series, specifically The X-Files and the work of American writer Stephen King.

[3] The facility is composed of "dungeons, trick elevators, deserted floors, passageways filled with smoke and dripping water" and "dark, dank, cavelike areas".

[8] UPN executives had pitched the series as following "young doctors in peril at a haunted old Boston Hospital" who must contend with "a healthy dose of terrifying paranormal occurrences and gripping medical emergencies".

[5] Spirits include "a mad scientist and his Igor-like errand boy",[2] and a woman dressed in 19th century fashion pushing a baby carriage through the halls.

[10] Grace finds further support from Dr. Nicole De Brae (Serena Scott Thomas), Dr. Bradley Sterling (Daniel Cosgrove), and Patrick Fortado (Adam Rodriguez).

[5] The exact nature of De Brae's loyalty is called into question, and Tim Goodman of the San Francisco Chronicle wondered if she will serve as a love interest or be revealed as one of the hospital's spirits.

[3][6] "It honestly felt like very fertile ground for a sort of horror/science fiction-based series, and I think anybody who has been in a hospital or spent a lot of time there, they have a kind of cringing feeling about the experience—particularly if they've lost someone or come close to losing their own life.

[16] The Seattle Post-Intelligencer's John Levesque felt that the network decided to produce All Souls in an attempt to find another successful series following the end of Star Trek: Voyager.

[1] All Souls was initially broadcast on Tuesday nights at 9 pm EST,[5] and aired directly after the reality television show Chains of Love.

[26] While discussing the cancellation, McCouch felt it was "doomed to fail" from the beginning and referred to UPN as "a loser network at that time" due its treatment of the series.

[2][7][10][25] Eric Mink of the New York Daily News praised the show's use of horror, and wrote that it would "set the dragging knuckles of UPN's core audience all a-tingle".

[2] The Los Angeles Times' Howard Rosenberg called the series "paranormal fun",[7] and television critic Kevin McDonough referenced All Souls as "a classic Aaron Spelling production" primarily due to its editing and special effects.

[5][9][29] Rob Owen of The Pittsburgh Post-Gazette gave the first episode a positive review, believing it set up enough story elements to show promise.

[5] LA Weekly's Robert Lloyd had a more mixed response to the series; while he felt that the Grace's initial interactions with St. Clair gave away too much of the plot, he found it "well-made within the limits of its ambitions".

[4][5] Tim Goodman noted that All Souls had aspects of The X-Files as well as from The Twilight Zone, Stephen King's 1977 novel The Shining, and the medical drama genre.

[4] Oxman was critical of the show's originality and its setting in a former asylum, saying it was similar to King's work and the 1996 film Extreme Measures, and felt it had "a superficial gloss" when compared to Twin Peaks.