Disaster Demon

The Disaster Demon is the main antagonist of Season 1's episode Phantom Traveler.

Phantom Traveler
The demon takes advantage of George Phelps' shot nerves by possessing him in the bathroom before he boards United Britannia Airlines Flight 2485. Midway through the flight, the demon rips a door open to make the plane crash. However, there are several survivors of the crash. The demon immediately sets out to finish them off; it possesses the flight staff of the plane a survivor boards and attempts to kill the survivor in a second crash. It succeeds in killing the co-pilot of United Britannia Airlines Flight 2485, Chuck Lambert, one of the survivors, by preying on his PTSD from the previous crash to possess him and force him to crash the plane he is piloting.

Next, the demon goes after flight attendant Amanda Walker, another survivor, who had been flight attendant on Flight 2485. To accomplish this, it possesses the co-pilot of United Britannia Airlines Flight 424. Meanwhile, Sam and Dean, who have been called in by Jerry Panowski to investigate, realize the demon's plan and determine that it is possessing the co-pilot. They enlist Amanda's help by having her lure the demon out so that they can subdue and exorcise it. While they are successful in forcing the demon out of the co-pilot's body, it escapes into the air duct and forces the plane into a dive. Sam is eventually able to complete the exorcism, sending the demon back to Hell and stopping the plane from crashing.

What Is And What Should Never Be
The demon does not appear, but it is stated that without Sam and Dean to stop it in Phantom Traveler, the demon was able to bring about the disastrous crash of United Britannia Flight 424, killing not only the demon's intended target of Amanda Walker but also 107 other innocent people. After Dean realizes this, he ends the djinn-induced dream this occurred in so that the lives that he and Sam saved in reality will not have been lost.

Powers and Abilities
This was a low-level and weak demon:
 * Demonic Possession - The demon manifested on Earth by possessing various people.
 * Superhuman strength - The demon was strong enough to open a plane door in mid-air despite the intense pressure outside. However, Sam and Dean were able to overpower it together while performing an exorcism.
 * Electromagnetic Interference - After being expelled from the co-pilot's body and into the plane, the demon caused the power to fail in an attempt to make the plane crash.
 * Invulnerability - The demon was able to survive its vessels being blown out of a plane and killed in a plane crash.

Weaknesses

 * Holy water - The demon was hurt by holy water.
 * Exorcism - Sam sent the demon back to Hell with an exorcism.
 * Devil's Trap - Like all demons, it could be bound by a devil's trap.
 * The Colt - As the Colt can kill any demon, it could kill this one too.
 * Demon-killing knife - As a regular low-level demon, it was vulnerable to being killed by the knife.
 * Angel Blade - Demons can be killed by angel blades.
 * Angels - Angels can easily kill low-level demons such as this one.
 * The First Blade - The First Blade is capable of killing any demon.
 * Death's Scythe - Can kill anything in existence.

Appearances

 * Season 1
 * Phantom Traveler
 * Season 2
 * What Is And What Should Never Be (referenced)

Trivia

 * This is the first demon that Sam and Dean encounter in the series (excluding Azazel) in chronological order.220px-Demonfirst.jpg
 * Demon smoke possessing a person through the eyes is likely a continuity error, as this is the first formal appearance of a demon on the show, and later appearances exclude this particular manner of possession. Also the demons voice in this episode is much more demonic and low pitched while all later appearances demons take on the voice of the vessel they're possessing.
 * The demon appeared to have knowledge about what happened to Jessica Moore implying that it served, or at least had some connection to, Azazel.