Episode structure
Episode 1: The blackout repeats, but one child remembers.
Episode 2: A maintenance worker appears in every loop with a different injury.
Episode 3: The dispatcher changes one announcement and saves one train, worsening the blackout.
Episode 4: The remembered strangers form a plan across timelines.
Episode 5: The final loop reveals the blackout is a rescue signal, not an attack.
Why it works
A time loop gives every short episode a natural reset, a fresh clue, and a reason for viewers to compare details.
Visual style
Neon transit thriller, cool blue shadows, flickering station lights, digital clocks, fast cuts, controlled handheld energy.