If you don't want to know the circumstances surrounding yesterday's entry in this slideshow, then don't read any further...
[spoiler]Yesterday's quote:
Ep #319 (1967) - Sam - 'You MUST remember that you've gotta be careful. We're still in danger.'
From "#0319/0320: Robservations 01/17/02: A Trap is Set"
Maggie returns to the cottage from a short walk to find her father worriedly pacing. She feels there's no longer any need for concern, but changes her mind when her father shows her the evening newspaper, its headline proclaiming, "Another Girl Attacked." You must be more careful than ever, insists Sam, increasing Maggie's fear.
[/spoiler]
Again, not a very detailed Robservations. But how things actually play out is after Sam expresses his concern that even though she's not supposed to, she sneaked off alone, Maggie protests that she didn't sneak out, she just walked out the door. But that's when Sam warns her with what is quoted. Her response is to say that she can't live being afraid of her own shadow. And when Sam counters that he's only trying to protect, Maggie says she knows what he's trying to do but there's no need anymore. But that's when Sam shows her the newspaper and she sees the headline.
I went looking for Sam saying that Maggie must be more careful than ever, but he actually says "gotta be" rather than "must be." Though what I did find with Sam saying "must" was what I quoted...