alias

so I have been watching season 4 of the show Alias on dvd for the past 2 1/2 hours. I do have to confess that I have been watching this show religiously since the beginning of the first season back in...oh, 7th or 8th grade. A long, long time. Yah but anyway, watching this show (even though, yah i know its only tv and its like entertainment and everything) has got me thinking. Tied in with all the cool spy missions and gadgets are a lot of very real-life situations that kinda made me wonder about sacrifice. The characters in the show all sacrifice a lot for their job, even though it's make-believe. What is the line between sacrifice and carelessness? Is there a line? When you sacrifice everything for a purpose, how can you expect to get something back in return? and what you do get, how can you judge if it is worth it or not?