a deep reserve of courage, and almost always summons the nerve to risk his own life during a mission if he deems it necessary (such as if Sarah Walker's life is at risk). Even the fear itself comes in handy: Chuck takes advantage of his keen fear of needles by inciting a torturer to threaten him with a needle so that he faints. In "Chuck Versus First Class", Shaw expresses the opinion that in some ways Casey and Sarah have held Chuck back in his development as a spy, due to his reliance on them to help him in difficult or dangerous situations. Both objected to Shaw sending Chuck out alone on a mission. Chuck was eager for an opportunity to get out from under his teammates' control and not have to "stay in the car". "Chuck Versus the Nacho Sampler" demonstrates the degree to which Chuck's personality has changed over the course of the series. Devon notes the ease with which Chuck is now able to lie to his sister, and he "burned" his first asset by using the relationship and turning him over to the same protective custody he himself was once faced with. At the end of the episode, Chuck began drinking to cope with his actions. This change was further highlighted in "Chuck Versus the Fake Name", where he is increasingly disturbed by what he is becoming and telling Ellie he doesn't know who he is anymore. In "Chuck Versus the Honeymooners", Morgan reveals that Chuck suffers from eczema (which Chuck admitted to having earlier in the series) and is an avid fan of DC Comics. In "Chuck Versus Tom Sawyer", it is revealed that Chuck is allergic to cats and Chuck admits to being allergic to all members of the polecat family (Whether this is true or said to avoid spending time at Jeff's residence is unknown). In relation to non-spy life Aside from its implications for his spy life, Chuck's personality is notable for the close relationships he develops with his family and best friend, its impact on his romantic life, and the position of leadership it earns him at the Buy More. Chuck's loyalty and dependability to his best friend and his family have given him people he can always fall back on throughout the series, despite the strains introduced by his spy life as mentioned above. Casey is impressed by Chuck's loyalty