In fourth season episode Abridging the Devil's Divide, Harper, Rhade, and eventually Dylan Hunt are captured by Templars intent on coercing Harper's assistance in building a time bridge to the future. The Templars control their prisoners in part by applying these sleep deprivation devices to their foreheads, rendering them weak and confused.
Painted flexible soft rubber prosthetic applique with embedded twist-on blue micro-LED module.
From Legends Memorabilia & Tribune Entertainment.
