Garibaldi's speech to Sinclair about the unnacceptable risks he takes is very timely.

This really impressed me first time round - it was more than a speech between character, it was a statement about the series itself. In e.g. Star Trek, command staff happily take totally unacceptable risks, and people rarely bat an eyelid. Garibaldi, on the other hand, implies that he is far from the only one who has noticed, and he is worried.

And of course, the "worth living for" theme is going to be picked up again later!