Sub-Train

The Sub-Train is a self-contained train within a train. It runs almost the entire length of Snowpiercer and is divided into three categories, one for each of the ClassesS01E03 - Access Is Power.
==Description==
The Sub-Train is a monorail track design with a single suspended narrow guideway, which means only one train cart can run at any given time. It's possible that horizontal switching takes place. The monorail system is separated into three sectors, each of one of the Classes, which means technically up to three carts in various directions can run the length of each sector. Considering the length of the train, the Sub-Train is used regularly by the characters, even though it is shown only a few times.
Under the Sub-Train tunnel also lies a narrow maintenance corridor that provides access to systems and the underside of the train which contains mechanical parts like hydraulics control. In case the Breachmen need to access the underside, they are sealed in the Corridor, so as to not let Freeze air in.
The Sub-Train tunnel also has a hydraulic system to keep the train steady. Damage to the system by Erik Sotto caused the Torreta Canyon Crisis.
==History==
===Season 1===
During the Year Two Rebellion, the Sub-Train doors were sealed, but the Tailies compromised the hinges (locks) and managed to open them.
The body of Sean Wise was found in a floor panel of the Sub-Train, that was discovered by Jakes Carter.
After being discovered as the murderer, Erik Sotto was corned in the Sub-Train of Utility Car (C0778), by the Jackboots and killed.
Before being killed, Erik shot a electrical box that later leaked and caused a electrical fault in Utility Car (C0778), the fault then caused one of the breaks to seize. A Breach team attempted to replace a motor to fix the problem, but it swings whilst being hoisted, killing Engineer Peter DiMarco and then falls down where it was removed, causing the train to buckle; numerous carriages rock back and forth. Later, Layton threaten to kill Melanie, after escaping the The Drawers, but she convinces him to let her fix the train. Melanie then goes outside to fix the master hydraulic by re-attaching the hydraulic pipe, but has trouble doing so as the train approaches the Torreta Canyon and derailment. Melanie is soon able to reattach the cable and the hydraulics come back.
During the Revolution, many Jackboots (at least 15) were killed in the Sub-Train by a large spike firing machine, manned by Big John, Jakes Carter, Tunnelman Hedges and several Tailies. When they ran out of spikes, Big John held of the Jackboots while the machine was moved to the next barricade, killing 2 before he fell.
Later, in the Sub-Train, a fight broke out between Sam Roche, Andre Layton and Nolan Grey and 2 Jackboots, but the two rebels were overpowered and Roche was knocked unconscious. Before Grey could execute Layton, Murray arrived with Strong Boy and Z-Wreck, whom he had rescued from the Drawers. The three overpowered Grey and his men, but Layton had them leave the Jackboots unconscious and flee with Roche uptrain for safety.
===Season 2===
When Wilford's sabotage of The Engine went wrong, the Tunnelmen were forced to manually disengage the bogie motors, so Big Alice could push with less resistance, in order to jump-start them.
During the rescue attempt of Melanie Cavill, Bojan Boscovic tried to disconnect The Aquarium, in the Sub-Train, by unlocking two J-Links. However he only unlocked one before 7 Jackboots stopped him and the car was destroyed soon after.
===Season 3===
After the separation of the Pirate Train, First Class became to frozen for the Sub-Train. Ruth Wardell who was leading the resistance, hid here (in a chamber behind vents), until she had to move to the 1st Class Dining Car, just in time.
Javier De La Torre and the Jackboots then built a EMP weapon, for the Pirate Train, in the Sub-Train of the first car of First Class.
Later, Pike, Lights and Strong Boy attempted to disarm the weapon but accidentally activated it. They then comprised the Sub-Train door to the outside and shoved the weapon along the Sub-Train rail, while they ran to another car and closed the door before the weapon smashed through the door to the outside as it opened and landed on the tracks before it went off.
After Melanie revealed to the train, that New Eden was a Fake, Ruth and Alexandra Cavill had Melanie, meet with Layton and Bess Till in the Sub-Train to talk. However, nether Layton or Melanie could come to a agreement and Melanie left.
==Appearances==
:;Season 1Season 2Season 3
== Trivia ==
* As showing in the Behind the Scenes video, they only have a small part of the Sub-Train constructed while everything else is added using CGI in post-production.
* The Tunnelmen, including Jakes Carter and Tunnelman Hedges, are responsible for maintaining the Sub-Train.
* Each Sub-Train cart has two seats, a flatbed in the back and has a axis to turn around to change which way it faces.
* The Sub-Train is accessible, in the battery section of Utility Cars, by a automatic hatch in the floor, with a Access Chip. 
* The Sub-Train is not accessible for the Tail Section.
* As Snowpiercer's crew can close the boundaries between classes ("borders"), the Sub-Train can be blocked as well.
* The Sub-Train has semi-transparent membranes to close off areas for maintenance.
* The Sub-Train has doors with locks for the separation of Cars.
* The cart that Grey and 2 Jackboots were going to use to transport Layton, was presumably left in the 7 cars that were separated in The Train Demanded Blood.
* Big Alice appeared to not have a Sub-Train.
==Gallery==
Sub-Train.png|Cart
Sub-TrainCloseup.png|Closeup
Sub-TrainTunnel.png|Tunnel
Sub-train.png|Bluescreen
File:Snowpiercer+Hatch.jpg|Entrance to the Sub train 
== References ==