I'm thinking that the sister only knew angela in a work environment. I remember them mentioning once that Zack was like 15. It is possible that they "acquired" the child (Dana/Zack) who was not a newborn...As for implanting false memories, that would definately have to be done by the parents more specifically Dad (remember how he tried to lock him away in a psychiatric hospital) in order to cover up. In a previous episode, Zack even called him "DAD" in a tone and with a look that implied Zack knew Paul was not his dad. As for the video, perhaps he was not at the party that was video taped but in fact had seen it when his wife brought it home to share the event with him; therefor he knew it existed. He knew to refer to it when he was trying to find out info about Huber's sister (can't remember her name!) What I would like to know is under what pretense they used to leave Utah. What does Mrs. Huber's sister know about the reason Mary Alice moved...and what exactly did Mrs. Huber know herself that caused her to leave the note that triggered the suicide...It's just a little too coincidental that Mrs. Huber's sister happened to work with Mary Alice who was Huber's neighbor...but then again...that is the magic of TV, they can make everything fit into neat little packages. Enough of my ranting...any other thoughts anyone?