<Ul> <Li> Her childhood experience in conning and concealing secrets has been sharpened by spy training; she is highly capable at combat, especially with throwing knives (she typically wears several in a sheath strapped to her leg when her wardrobe allows,) and to a lesser extent her favored side arm throughout the series, the Smith & Wesson Model 5906; she is able to speak in several foreign languages (Polish, Russian, Spanish and German, and can understand at least some Swedish) and accents . </Li> <Li> Before she meets Chuck she is apparently, in Casey's words, "Langston Graham's wild - card enforcer," and in her own words in "Chuck Versus the Tooth", does not envision a future for herself beyond her next mission . She is determined to personally resolve Bryce's perceived personal and professional betrayal . </Li> <Li> And finally, her professional need to keep her past and emotions a closely guarded secret also suits her temperamentally . She does not readily discuss her personal history or reveal her real name, and repeatedly states the conventional wisdom of the spy community that emotion and love create vulnerabilities . It is later revealed that a key event in her becoming cold and distant was the day of her "red test," or first kill, which she considers to be the worst day of her life and the details of which she never forgot; and one of her greatest stated fears is Chuck becoming like her when he is ordered to undergo his own red test . </Li> </Ul> <Li> Her childhood experience in conning and concealing secrets has been sharpened by spy training; she is highly capable at combat, especially with throwing knives (she typically wears several in a sheath strapped to her leg when her wardrobe allows,) and to a lesser extent her favored side arm throughout the series, the Smith & Wesson Model 5906; she is able to speak in several foreign languages (Polish, Russian, Spanish and German, and can understand at least some Swedish) and accents . </Li> <Li> Before she meets Chuck she is apparently, in Casey's words, "Langston Graham's wild - card enforcer," and in her own words in "Chuck Versus the Tooth", does not envision a future for herself beyond her next mission . She is determined to personally resolve Bryce's perceived personal and professional betrayal . </Li> <Li> And finally, her professional need to keep her past and emotions a closely guarded secret also suits her temperamentally . She does not readily discuss her personal history or reveal her real name, and repeatedly states the conventional wisdom of the spy community that emotion and love create vulnerabilities . It is later revealed that a key event in her becoming cold and distant was the day of her "red test," or first kill, which she considers to be the worst day of her life and the details of which she never forgot; and one of her greatest stated fears is Chuck becoming like her when he is ordered to undergo his own red test . </Li>

When do chuck and sarah first get together