Since its premiere in 2005, Supernatural has entranced viewers with its supernatural saga of the Winchester brothers. Sam and Dean, groomed by their father to combat the forces of darkness, traverse the United States in their iconic '67 Chevy Impala. Fans have concocted a plethora of mystical theories, ranging from time loops to multiverse intersections, that expand upon the brothers' thrilling adventures.

The Office, with its charmingly mundane depiction of the Dunder Mifflin Scranton branch, has inspired fans to delve into unconventional theories surrounding its quirky characters. Premiering in 2005, this beloved show has sparked wild speculation, from hidden conspiracies within the company to hypothesized connections with other TV universes.

Since its debut in 2000, Malcolm in the Middle has portrayed the chaotic life of a gifted teen among his delightfully dysfunctional family. Fans have speculated fantastically about Malcolm's future—rumors abound that he might have a critical role in uncovering governmental secrets or that the series subtly parodies world governance through its oddball narrative.

The classic animated series Scooby-Doo, Where Are You! has always been a fascination factory for fans since it first aired in 1969. The combination of a talking dog, endearing human companions, and tentatively solved mysteries has provoked endless theories—for example, an eternal time loop or the gang serving as purgatorial beings who unmask the sins of humanity.

From the harrowing plane crash to the enigmatic island, Lost, which aired in 2004, has endlessly intrigued viewers with its mysteries. Fan theories range from the island being a microcosmic purgatory to elaborate connections with ancient mythologies, all stemming from the inherent cryptic nature of J.J. Abrams's creation.

Since 2005, It's Always Sunny in Philadelphia has delighted fans with its chronicling of a dysfunctional group of friends running a dive bar. Formulating theories on this show involves delving into potential alternate realities or the gang being representations of psychological archetypes, reflecting the chaotic comedic universe they inhabit.

Debuting in 2022, FROM presents a nightmarish town entrapping those who enter. The series has sparked intriguing fan theories, with possible time-loops, enigmatic rips in spacetime, or that the town is a psychological manifestation of its inhabitants' fears.

Since 2014, BoJack Horseman has captured the melancholic essence of Hollywood's existential dread through its titular character, a troubled horse. Fans creatively hypothesize on its narrative implications, suggesting deeper socio-political commentaries or a post-apocalyptic future as the backdrop for this darkly comedic series.

Since 2003, NCIS has been enthralling audiences with its thrilling narratives of naval crime solving. Theories abound regarding hidden plots within the organization itself or its characters serving as pawns in a larger governmental chessboard, thanks to the globe-trotting, espionage-fueled setup of the series.