Alvis – tech manager/investigator (2019–2020) Brian Murray – investigator (2019–2020) Richel Stratton – investigator (2019–2020) Kristyn Gartland – investigator (2005–2009) Joe Chin – investigator (2008–2010, moved to GHI; 2014 guest) Andy Andrews – investigator (2004–2007; moved to GHI) Traci Boiselle – case manager/Halloween special 2011 Center Command staff (2011; 2016) Joshua Ovenshire – tech manager (2016) Barry Fitzgerald – investigator/GHI lead investigator (2006–2010) Michelle Tate – Ghost Hunters Academy alumni, investigator (2013–2014) Mike Dion – investigator (2004–2007) Lisa Dowaliby – investigator (2006–2007) Ashley Troub – investigator (2012) Carl Johnson – demonologist (2004–2006) Paula Donovan – investigator (2005–2006) Celebrity guest appearances (2008–2016) During its first run of episodes, aside from guest investigators with connections to The Atlantic Paranormal Society, Ghost Hunters utilized connections with other Syfy and NBCUniversal series to feature actors and personalities from those programs, in particular during the live specials and especially those for Halloween: Josh Gates – multiple episodes (also Ghost Hunters live specials host) Meat Loaf – "A Bat Out of Hell", "Sloss Furnaces", and “The Haunted House on the Hill” episodes. Elijah Burke – "2007 Halloween Special" episode Colin Ferguson – "USS Hornet" episode Ben Hansen – "2010 Halloween Special" episode Kofi Kingston – "2010 Halloween Special" episode Nene Leakes, Shereé Whitfield and Kim Zolciak – "T.A.P.S. Meets The Real Housewives of Atlanta" episode Joe Maddalena – "2010 Halloween Special" episode Eddie McClintock – "Ghost of Buffalo Bill" episode Mike "The Miz" Mizanin – "2008 Halloween Special" episode CM Punk – "2006 Halloween Special" episode Meaghan Rath – "2010 Halloween Special" episode Allison Scagliotti – "2010 Halloween Special" episode Amanda Tapping – "2008 Halloween Special" episode Steve Valentine – "2008 Halloween Special" episode Meredith Vieira – "Murdered Matron" episode Production On March 3, 2010, Ghost Hunters''' 100th episode aired, featuring their investigation of Alcatraz Prison. The two-hour special featured a live studio audience with question and answer segments, hosted by Josh Gates of Destination Truth. The special also featured the GHI crew, the winning contestants of Ghost Hunters Academy, and Craig Piligian, the creator and executive producer of Ghost Hunters. On June 2, 2011, Syfy renewed Ghost Hunters for an eighth season, marking it as the longest-running reality series to air on the network. On February 15, 2012, Grant Wilson announced he would be leaving the cast of Ghost Hunters in order to focus on his personal life. In a statement, Hawes responded with, "I