I don't think Sarah wants to harm Barnabas. Just as he needs her forgiveness, she desperately wants an explanation for all the awful things she's seen him doing. I do think she knew the danger that David would be in if she showed him Barnabas asleep in the coffin at the Old House. I think she showed him the empty coffin in the hope that he might have some ideas about what's going on with her big brother--and to keep David with her a little while longer.
I like the interplay among Maggie, Sam, and Joe. The actors work very well together, and these three characters make a lovely and affectionate family unit.
Vicki is waiting for Burke at the BW--why didn't he pick her up at Collinwood? Barnabas would huff that a gentleman would escort her into town--and wouldn't keep her waiting.
Anyway, while Vicki is waiting for Burke, Joe tells her about the mysterious Sarah, who keeps appearing and almost certainly knows something about what happened to Maggie. When Maggie and her pop arrive, Vicki shares her theory, and they all compare notes on Sarah. Maggie has a brief memory flash of some “tinkling music,” but unlike Burke two episodes ago, Vicki fails to make the connection to her music box. C'mon, Vicki!
Shortly after Burke arrives, the Evanses and Joe leave. Sam doesn't finish his drink!
I love the way Vicki takes apart every one of his arguments. This is a glimpse of the old Vicki, who stood "on her own two feet"! This scene gives us a hint of what happened when Burke ordered her to stay away from Barnabas. I imagine this command met with a frosty silence, and the date ended soon after.