巴尼被一种化学药剂麻痹并被抓获，这促使菲尔普斯想出了营救巴尼的计划。然而，碟中谍小组需要一个在计算机方面拥有巴尼专长的人。所以他们才请了杰罗姆·卡林博士。可惜卡林博士不打算合作，这使得任务更加困难。

In the Middle East Willy and Barney infiltrate a chemical plant to gain access to Dehominant-B, a quick-acting lethal gas. Barney is exposed to Dehominant-A while trying to get to the computer and crippled - Willy escapes and Barney is captured. Barney is interrogated and only has four hours to live. The team find out that Dr. Jerry Carlin, a dropout, is the only other person with the skills to access the computer. When Carlin rejects the team's appeal for help, Jim and Paris frame Carlin's girlfriend and threaten to keep her in jail unless he helps them. Dana provides a distract and Paris takes the head scientist Vazan's place and have Barney first fake a confession implicating the technicians and then his own death - they get Barney to the autopsy room where Doug revives him in the nick of time. Jim and Carlin take the incriminated technicians' place and Carlin manages to ruin the Dehominant and erase the computer, then everyone escapes with Vazan.

Barney se trouve en pays ennemi pour détruire une arme chimique fabriquée par un ordinateur hyper-sophistiqué. L'agent est malheureusement grièvement blessé et fait prisonnier. Phelps et ses hommes se mettent à sa recherche...