The truth shall set you free.
The December 10 episode of Arrow will feature the return of Dinah Lance (Alex Kingston) and it appears that Laurel will finally be able to tell her parents the truth about what happened to Sara.
“Laurel has a really emotional journey about that in that episode, for sure,” Greg Berlanti told said to TVLine.com. “Whenever we get that whole family together, especially subsequent to stuff that’s happened, it will bring a lot of that to surface.”