The Hydra/Theories

Theories about
The Hydra

Theories may be removed if ...

Stated as questions or possibilities (avoid question marks, "Maybe", "I think", etc).
More appropriate for another article.
Illogical or previously disproven.
Proven by canon source, and moved to main article.
Speculative and lacking any evidence to support arguments.
Responding to another theory (use discussion page instead).

See the Lostpedia theory policy for more details.

Animals

Juliet has mentioned that Jack's examination room was used for dolphins and sharks. The room also has some sort of sound equipment, evidenced by the mixer.
Jack's examination room was used to dock submarine(s) as well.
- Very unlikely when you look at how small it was, and the fact that the entrance door is only the size of a person.
The intercom, chains/pulley system and table in Jack's cell indicate that this was an operating/treatment room for large animals. It used to be flooded to provide an observation/recovery area for the animals after treatment.

Walt was possibly kept in the glass room, where Jack is held prisoner.
Walt's initials can be seen engraved on the wall behind Jack when he is sitting on the floor with his back against the wall.
Kelvin and Radzinsky did not know about it or were unable to get near it to document its location.
The Hydra is depicted on the maps that Sayid stole from Rousseau, instead of being labeled The Hydra it was labeled Alex.

The Hydra is station "C4?" on the blast door map. The second island would account for the apparent disconnect of this station from the main island. References to "KEV-4?" as a zoological station and ursus maritimus are also noted in this general area.
The door that Jack opened is how The Others get in the submarine to get to the Main Island

I'd be more willing to bet they just get in and out of the top of the sub, as they do in the episode where Juliet flashes back to first coming to the island.

The Blast Door Map shows location C3 on a small island separate from the Main Island. C3 is the Hydra Station.

Jack's father is alive and being held by The Others somewhere on the Island. He managed to get a message through to Jack via the intercom.
Alex managed to use the intercom to communicate to Jack that she had unlocked his cell door in an attempt to free him.
The messages on the intercom were sent by The Others to intentionally confuse or misguide Jack.
The Intercom has shown qualities similar to those that have been recognised in the entity we call The Monster, primarily the fact that Jack's dead father, Christian has spoken to Jack through it. Jack has been "contacted" by people through it, telling him things that would be hard or even impossible for them to know (Alex knowing that the door was open, for instance). He has also been able to overhear parts of conversations not intended for his ears. And he has not to our knowlegde been able to communicate back to any of these persons. Also, in "Every Man for Himself", after the initial message from Christian, we get to overhear Tom talking about how the intercom is still malfunctioning after the discharge - hinting that The Others are not using it, since they think it's not working.

The "Hydra" name refers to the fact that the station is comprised of multiple, independent but interconnected, operating units -- "heads" -- just like the mythological hydra has.
- Highly unlikely, since "The Hydra" logo shows the animal named Hydra.
  - The "Hydra" logo could hint that there are multiple things going around there, hence the hydra with its multiple heads. This, in contrary to, for example, the Pearl, which function is only to observe.
Legend states that the Hydra protected Crater the Cup, the chalice tossed to the heavens by Apollo. Also note, the Others (decoy) village appears to sit in an ancient crater. (taken from a posting on thefuselage.com's message board)