While Nolan is held captive by Rosalind, the LAPD and FBI (including Feds characters Brendon Acres and Laura Stensen) work frantically to locate and dismantle the trap.
Officers Tim Bradford and Lucy Chen enter the basement area below the tank. The situation is particularly triggering for Lucy, who survived a similar ordeal at Rosalind's hands in Season 2. [S5E4] The Choice
The tank is a sophisticated "remix" of Rosalind’s previous work, featuring an electrified grate and a system that slowly fills the chamber with water. While Nolan is held captive by Rosalind, the
Detectives Harper and Lopez track down a warehouse used by Rosalind's accomplice, Jeffrey Boyle, to build the tank. The tank is a sophisticated "remix" of Rosalind’s
The hunt for the sniper and accomplice continues in the subsequent episode of The Rookie: Feds . 'The Rookie' Recap: Season 5, Episode 4 “The Choice”