Locate the contact

 is a side mission given by Sidorovich from v1.4002 onwards.

Overview

 * The mission consists of three sub-tasks.


 * 1) Find Nimble
 * 2) Rescue Nimble
 * 3) Report to the trader (Sid)

Find Nimble

 * Nimble is located in the Underground Tunnel System (same system you visit for Find the missing wagon key)
 * The Road Tunnel where you met Petruha and his team for Find the second contact, now has an unlocked hatch.
 * Head through the now unlocked hatch and into the tunnel system below
 * There are numerous Poltergeists and Rats roaming the tunnel hallway
 * Dispatch all enemies and locate another locked hatch that will initiate a dialogue with Nimble.

Rescue Nimble

 * Initiating the dialogue will spawn another Poltergeist to deal with.
 * Once this is complete the hatch will unlock and you may speak to and rescue Nimble.

Report to the Trader

 * Return to Sidorovich

Trivia

 * One shot from the Sawn-off Double-barrel Shotgun w/ 12x70 Buckshot at point blank range can instantly kill the Poltergeist.