Vampire Barnabas Collins has decided that he will eventually kill his sometime accomplice turned bête-noire, mad scientist Julia Hoffman. Julia has decided that her only possible helper is the ghost of Barnabas’s ten year-old sister, Sarah.
Julia goes to Sarah’s grave in the Tomb of the Collinses and calls to her. She hears the strains of “London Bridge,” then sees Sarah. Sarah tells Julia that she will not help her, because she killed someone she liked, Dr Dave Woodard. Julia tries to put the blame for that crime on Barnabas, but Sarah declares that she helped him. We heard “London Bridge” in the background during the murder scene in #341, so we know that Sarah saw the crime and Julia will not be able to deceive her.
In this scene, Sarah says that she cannot act directly against Barnabas. This is a striking moment, because it is the first time Sarah has spoken her brother’s name out loud. Sarah’s statement explains why she watched as Barnabas and Julia killed Woodard, and also why so many of her attempts to protect her friends from him have ended up with them in worse shape than before and Barnabas insulated from all accountability.
When Julia was working with Barnabas, she too made desultory attempts to restrain his worst tendencies, while always protecting him from the consequences of his actions. The dynamic between them mirrored the Bossy Big Sister/ Bratty Little Brother pattern that matriarch Liz and her brother Roger have been modeling from the first day of the series. Seeing Julia with Barnabas’ literal sister, we see that this dynamic has defined the Collinses for centuries.
Acilius on Dark Shadows 