Paranormal Challenge is an American competitive paranormal reality television series that premiered on June 17, 2011, on the Travel Channel.
 A spinoff of "Ghost Adventures", the series was created and is hosted by lead investigator Zak Bagans, who challenges ghost hunters from around the United States to go head-to-head in a weekly competition to gather paranormal evidence by spending a night in reportedly haunted locations in the United States.
 The first season of the show ended on September 16, 2011.
 Lead judge David Schrader announced on Darkness Radio that the show would not be renewed for a second season.
Nick Groff (born April 19, 1980) is an American paranormal investigator, musician, and television personality.
 Groff is currently the lead investigator for the television series "Paranormal Lockdown" and the "Ghosts of Shepherdstown".
 He was a co-investigator and executive producer of "Ghost Adventures", as well as an editor and cameraman for the show from seasons 1-10.
 Groff was an executive producer for a show on the Travel Channel called "Vegas Stripped", a behind-the-scenes look at the operations of the South Point Hotel, Casino & Spa in Las Vegas, Nevada.
Paranormal Lockdown is a paranormal reality television series.
 It is executive produced by Nick Groff of "Ghost Adventures" fame.
 The series follows Groff and fellow paranormal researcher Katrina Weidman (formerly of "Paranormal State") as they confine themselves for 72 straight hours in some of the most haunted locations.
 The first season aired on Destination America from March 4, 2016 to April 8, 2016.
 The second season aired from December 16, 2016 to March 3, 2017 on TLC.
Deadly Possessions is an American television series about the paranormal that premiered on April 2, 2016, on the Travel Channel.
 Produced by MY Entertainment (formerly MY Tupelo Entertainment), the series features paranormal investigator Zak Bagans of "Ghost Adventures" as he showcases his haunted artifacts in his new museum in Las Vegas, Nevada.
 He shares stories of the items dark history, which he mostly receives from people all over the world, or during his investigations and lockdowns.
"Ghost Adventures" is an American television series about the paranormal created by Zak Bagans and Nick Groff, airing on the Travel Channel.
 The series follows ghost hunters Zak Bagans, Nick Groff (seasons 1-10), and Aaron Goodwin as they investigate locations that are reported to be haunted.
 The show is introduced and narrated by Bagans.
 s of 23, 2017, episodes of "Ghost Adventures " have aired, including specials.
Ghost hunting is a pseudoscience wherein its adherents visit and investigate locations that are reported to be haunted by ghosts. Typically, a ghost hunting team will attempt to collect "evidence" that they see as supportive of paranormal activity.
 Ghost hunters often use a variety of electronic devices: the EMF meter; digital thermometer; handheld and static digital video cameras, such as thermographic (or infrared) and night vision; digital audio recorder; and computer.
 Traditional techniques such as conducting interviews and researching the history of a site are also employed.
 Some ghost hunters refer to themselves as a "paranormal investigator".
Jeff Belanger (born August 8, 1974) is an American author, public speaker and paranormal investigator.
 He has served as the host of "New England Legends" and has appeared on "Ghost Adventures".
Sci Fi Investigates is a six episode reality television series featuring skeptic Rob Mariano, forensic specialist Deborah Dobrydney, archaeologist Bill Doleman, and paranormal investigator Richard Dolan, as they look at paranormal and supernatural phenomenon and try to explain them.
 The show debuted in October 2006 on the American SyFy channel (formerly Sci-Fi Channel) following "Ghost Hunters".
 There have also been two webisodes.
Patrick Burns (born 1968) is an American paranormal investigator, best known as star of the TruTV (formerly Court TV) series "Haunting Evidence".
 He is the founder of the popular website Ghost Hounds, which in 2001 was featured in an Emmy award-winning Turner documentary "Interact Atlanta - 'Ghost Hounds' ".
 Burns is also the organizer and director of Ghostock, paranormal enthusiast events held at various locations across the USA, and is a professional photographer through Patrick Burns Photography.
Zachary Alexander "Zak" Bagans (born April 5, 1977) is an American paranormal investigator, actor, television personality, and author.
 He is the principal host of the Travel Channel series, "Ghost Adventures".

Question: What is the nationality of the paranormal investigator on "Ghost Adventures"?
Answer: American