<P> Most of Ellie 's appearances in the series have been as part of the side - plots involving Chuck 's real life and coworkers at the Buy More , so she has rarely figured prominently into the main arc . Her most significant role in the main plot of an episode came in `` Chuck Versus the Truth , '' in which Ellie attempted to treat nuclear expert Mason Whitney when he was poisoned by Reardon Payne . When Whitney later died , Payne , disguised as a police officer taking a statement , exposed Ellie to the same toxic truth serum he used on Whitney to find where he hid his nuclear codes . Ellie nearly died as a result of the poisoning until Chuck administered the antidote . Although she was in a coma during this time , Ellie became the first person Chuck told about his secret life . She was also among the hostages in the Buy More when Ned Rhyerson crashed his car into the store while evading the police . For her sake , Chuck convinced Devon not to go through with a plan to overwhelm Ned , and later identified himself as the Intersect to Mauser to prevent him from killing her . The bracelet Chuck gave to Sarah in the same episode was a charm bracelet Chuck and Ellie 's father gave to their mother when Ellie was born . </P>
<P> Most of Ellie 's appearances in the series have been as part of the side - plots involving Chuck 's real life and coworkers at the Buy More , so she has rarely figured prominently into the main arc . Her most significant role in the main plot of an episode came in `` Chuck Versus the Truth , '' in which Ellie attempted to treat nuclear expert Mason Whitney when he was poisoned by Reardon Payne . When Whitney later died , Payne , disguised as a police officer taking a statement , exposed Ellie to the same toxic truth serum he used on Whitney to find where he hid his nuclear codes . Ellie nearly died as a result of the poisoning until Chuck administered the antidote . Although she was in a coma during this time , Ellie became the first person Chuck told about his secret life . She was also among the hostages in the Buy More when Ned Rhyerson crashed his car into the store while evading the police . For her sake , Chuck convinced Devon not to go through with a plan to overwhelm Ned , and later identified himself as the Intersect to Mauser to prevent him from killing her . The bracelet Chuck gave to Sarah in the same episode was a charm bracelet Chuck and Ellie 's father gave to their mother when Ellie was born . </P>
when does ellie find out chuck is the intersect
when does ellie find out chuck is the intersect
`` Chuck Versus the Truth , ''
`` Chuck Versus the Truth , ''