The Twilight Zone (aka the Twilight Cage) is an alternate zone comprised of vast barren wastelands, darkness and space, where time flow is roughly one quarter the speed of Mobius Prime's. After the Forgotten War, the Echidna group known as the Nocturnus Clan were somehow transported to the Zone and managed to sustain themselves with advanced technology. (SSSM: #2)

When the Dark Legion began their attacks on Echidnaopolis, the current Guardian of the time, Steppenwolf, used his vast knowledge of Chaos energies to banish Menniker and the rest of the Dark Legion to the Twilight Zone. There the Dark Legion continued to live for centuries, periodically making brief escapes only to be returned to the confines of the zone. (KtE: #3, #18, #25)

When Dr. Ivo Robotnik fired the Ultimate Annihilator, the weapon weakened the dimensional barriers, allowed the Dark Legion to escape once and for all. Fluctuations in the barriers to the dimension continued to linger on for months afterwards though as Knuckles the Echidna was briefly pulled in and trapped there with the arrested Dark Legion Grandmaster Kragok while interrogating him for information about the former Guardian Tobor being replaced by the imposter Moritori Rex. They remained there for a brief period until a portal back to Mobius Prime opened and they escaped, although the real Tobor then pulled Kragok back in before it closed so he would not get away. When the Dark Legion fired the Quantum Beam to undo the effects from its first use on Angel Island, it inadvertently reopened the doorway to the Twilight Zone and both Tobor and Kragok emerged only to fall into the Dark Legion's Battle Cruiser, destroying the Quantum Beam and killing them both. (StH: #50, #100, KtE: #5, #18)

The Zoah are apparently another race inhabiting the Twilight Zone. Kragok explained to Lien-Da that at worse the left over evidence from the experimental weapon atomizing Luger would appear to be a Zoah attack. (StH: #205)

In 3236, the surviving members of the Brotherhood of Guardians (aside from Locke) and Moritori Rex were dumped in the Twilight Zone by Dr. Finitevus once he had completed his studies of them. After learning the fate of the Brotherhood via the former Legionnaire Dimitri, Knuckles and Julie-Su attempted to use a Warp Ring to travel the Zone and mount a rescue, but it failed to transport them between Zones. (StH: #183, #232)

Background informationEdit

• It is likely that the Twilight Zone was the inspiration for the Twilight Cage in Sonic Chronicles: The Dark Brotherhood, as it shared many similarities. The Twilight Zone was even called the Twilight Cage in 2009's Sonic Free Comic Book Day Special, possibly because Ian Flynn is trying to make the comic and game universes as similar as possible during his tenure as writer and has renamed the Twilight Zone to mirror or reference the game version. The usage was repeated in StH #205, establishing it as official canon. The Mobius timeline presented in Sonic Super Special Magazine #2 would appear to confirm this.
• It is explained in Sonic Super Special Magazine #2 that the Marauders of the Nocturnas Clan had also been banished to the Twilight Zone. It is unknown if the clan and the legion ever encountered each other in the zone.
• It is also likely that it was named after the 1959 Science-fiction TV show made by Rod Serling called The Twilight Zone. By coincidence, William Windom (the voice of Uncle Chuck in SatAM) appeared in that show.
• Its also possible that the 'Zone of darkness of wasteland' was a likely reference to the Phantom Zone. In 1980 and the comic books a movie called Superman 2 appeared and it featured a zone that was made of glass but had darkness on the inside.