BuzzFeed Unsolved

BuzzFeed Unsolved True Crime and Supernatural were originally co-hosted by Bergara and Brent Bennett until Madej took over from Bennett in late 2016[5][14] due to Bennett no longer having enough time to devote to the show's production.

The show has a dynamic between its co-hosts, with Madej acting as a skeptic against Bergara's theories and belief in ghosts.[15] The contrast between Bergara's belief in conspiracies and the paranormal versus Madej's skepticism provides the majority of the comedic dialogue producing a "Buddy Comedy" feeling to the Show;[16][14] however, despite Bergara's strong belief in otherworldly spirits, he shows reluctance towards belief in cryptids such as Bigfoot and aliens, in contrast to Madej, who conversely believes such creatures to be somewhat more realistic or grounded in reality.

"Nightshade" by David O'Brien, which typically plays during the theories section, is considered the series' unofficial theme song.

The episodes were normally filmed with the two hosts at a desk, with Bergara presenting Madej and the audience with either a True Crime or Supernatural case depending on the season, aided with the use of stock photos, live action recreations with guest actors, and other visuals. Sometimes, episodes were similar to a mix of Supernatural and True Crime regardless of whether they were the former or the latter; an example being The Eerie Vanishing Of The Flannan Isles Lighthouse Keepers, a case which occurred off the coast of Scotland. In some episodes, the hosts and other crew members traveled around to investigate a location(s), although this method was primarily used for the Supernatural episodes; the show's True Crime seasons were typically filmed all within the Unsolved set.[17] Due to the show's growth in popularity, Bergara would work with a number of individuals to propose cases if the show was capable of covering them, while Madej would be kept out of the process to give a more fresh perspective.[18]

In the show's True Crime seasons, Bergara focuses on unsolved crimes, particularly well-known cold cases from many years ago. In most episodes, Bergara reads out the story of the case, including evidence the police working on the case used, before presenting a handful of possible suspects and theories, from both the official police reports and the ideas of others, coupled with evidence that can both prove and disprove their involvement. During these cases, Madej will cut in to provide his input, comedic observations, responses, and theories to Bergara, ending the episode with both hosts discussing which theory appears most likely based on the suspects involved.

In the show's Supernatural seasons, Madej and Bergara discuss alleged paranormal entities, hauntings and demons, often seeking evidence of their existence. Most Supernatural seasons include one alien and one demon-themed episode per season. Some episodes, such as the Roanoke colony and Anneliese Michel episodes, are presented at a desk in a format similar to that of True Crime. However, most involve some sort of in-person investigation.

Throughout their investigations of hauntings, both Madej and Bergara use a variety of instruments and equipment to attempt to collect evidence, including video and audio devices. Other BuzzFeed Unsolved: Supernatural episodes investigate supernatural entities and phenomena such as Mothman, Bigfoot and the existence of aliens. The two aim to create an "everyman approach" in discussing the topics, with the use of humor in an effort to balance the tone between dark and goofy.[18]

In BuzzFeed Unsolved: Supernatural Season 4, Ancient Aliens contributor Giorgio Tsoukalos was featured in the discussion about a potential UFO sighting.[19] A recurring guest on the show in early seasons was the "Vatican approved exorcist" Father Gary Thomas, who discusses his belief in demons and the supernatural. During Postmortem episodes, guest co-hosts would occasionally be brought in. In "BuzzFeed Unsolved: Supernatural" Season 6, YouTuber Loey Lane was featured in the discussion of the strange incidents that had led her to believe her house was being infested by demons.