Jill Roberts - Series

Series

In "Chuck Versus the Ex", set six years after Chuck's expulsion, he and Jill unexpectedly reunite while he was providing technical support for a scientific conference that Jill was attending with her boss, Dr. Guy LaFleur. Chuck was ordered to use his connection with Jill to learn more about LaFleur, who was suspected of developing a biological weapon. After LaFleur was killed by a Fulcrum agent, Jill revealed that he actually uncovered the plot and was attempting to stop it. Chuck later identified himself as a government operative to obtain her assistance once the bioweapon was unleashed in a scientific conference. After this, she and Chuck began dating again in secret while Chuck continued to maintain his cover relationship with Sarah, which both women found uncomfortable as they were both jealous of each other. In "Chuck Versus the Fat Lady", Jill aided the team when they began to search for a list of Fulcrum agents that LaFleur had stolen and had intended to turn over to the CIA. As Jill was familiar with the puzzles LaFleur used to protect his valuables, she was able to assist the team with recovering the data. As Chuck and Jill decided to embark on a romantic getaway, Casey and Sarah were reviewing the list and matching it with a list of government agents. It was then revealed Jill was in fact a Fulcrum agent.

Jill's Fulcrum handler was a man known only by the code-name Leader. Her own Fulcrum callsign was "Sandstorm", which Casey and Sarah told to Chuck to trigger a flash and confirm their warnings. Chuck agreed to help bring Jill into custody, however Jill was already setting Leader's plan to infiltrate Castle in motion. She played on Chuck's trust and feelings for her to lead him to believe she wanted to escape Fulcrum, manipulating a lie-detector test in order to convince him that they could really be together. She and Leader both underestimated Chuck's computer skills, which he used to first lock down Castle, engineer his own escape, and release Casey to deal with Leader. Jill attempted to kill Sarah, but Chuck tricked her into getting into the Nerd Herd vehicle and used its built-in detainment system to place her under arrest.

Jill returned in "Chuck Versus the First Kill". She agreed to help the team rescue Stephen Bartowski in exchange for being released into witness protection, although Chuck was unauthorized to make such a deal. Jill attempted to escape during a firefight between Sarah and a Fulcrum team while infiltrating a Fulcrum office fronting for a recruiting center, but changed her mind and returned to help Chuck. After overhearing where Stephen was being taken, she told Chuck and in return he honored his promise by letting Jill escape.

As of the end of Season 2, Jill is still at large. It is unknown whether she has returned to Fulcrum or has turned rogue.