Just in time for Comic-Con, the investigators on National Geographic Channel's (NGC) Chasing UFOs are taking it to the streets, putting their alien explorations on hold to probe a mysterious outbreak of the undead at the 6th Annual Zombie Walk: San Diego on Friday, July 13, at 5:30 p.m. Erin Ryder, tech supervisor and lead researcher; Ben McGee, geologist, radiation scientist and field explorer; and James Fox, "UFOlogist," will all be on hand at the iconic global event to mingle with fans and pass out free swag, Frisbees and ice cream from Chasing UFOs-branded pushcarts.

The next day, Saturday, July 14, from 11:30 a.m. to 1 p.m., fans will get the chance to have their own close encounters with these real-life "Scullys and Mulders" at a special free autograph signing in room AA08 of the San Diego Convention Center. There, fans will be able to hear firsthand accounts of what the investigators experienced in the field as they researched some of the most famous sightings to date such as an alleged alien spacecraft crash landing site in Roswell, N.M., and Travis Walton's alleged abduction location, which was depicted in the feature film "Fire in the Sky."

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The Chasing UFOs investigators are sure to bump into a few like minds at Comic-Con, as a recently published extraterrestrial survey from NGC reported that more than 80 million Americans believe that aliens exist. The survey also found out which caped crusader Americans would call upon in the event of an alien attack. One in five Americans (21 percent) answered that they would most likely call on the Hulk to deal with the havoc. Far fewer, would most trust Batman (12 percent) or Spiderman (8 percent) to step in. Erin Ryder offered her own take on the situation, saying, "If I needed some extra assistance in an alien attack, and I hope I never do, I would have to say that I'd be looking for some strong females to be by my side. Sorry Marvel's The Avengers, but I'd take Wonder Woman, Buffy the Vampire Slayer or Lara Croft: Tomb Raider any day of the week."

National Geographic Channel's Chasing UFOs airs Fridays at 10 p.m. ET/PT. On Friday, July 13, Chasing UFOs explores the skies above the desert sands of Roswell, N.M., which have been home to thousands of reports of unidentified flying objects. One particular home video has the Chasing UFOs team in hot pursuit of the truth. Does the mysterious video really show an actual crash landing of an alien spacecraft? Under cover of darkness and armed with night vision gear, Erin Ryder, Ben and James Foxscour the alleged crash site ... and come across a surprising find that has them questioning a military cover-up.