Max substitutes at the CONTROL spy school for a day, helping two new agents Agents 198 (Fred Willard) and 199 who are lacking in their tailing skills. As a good exercise, Max has the new agents tail 99, who is on her day off, as she completes errands and shops for the upcoming wedding. However, unbeknownst to Max, the Chief had assigned 99 to pick up components of a scientific formula, leading the rookie agents to think she is acting suspiciously. Of course 99 spots the rookies right away and assumes that they must be KAOS agents. There is also a funny scene between Max and the Chief involving the Cone of Silence. The title of the episode references Dickens' A Tale of Two Cities.