Although one wishes they couldve found a more exciting way to build to that reveal.
But Dinah doesnt have time to think about that once she gets to work.
They find some blood, which obviously turns out to be Franks.

Credit: Nicole Rivelli/Netflix
On the feed, Davids son punches his sister after she tells Sarah about the stolen skateboard.
Curtis immediately tells Frank that Billy knows hes alive and is searching for him.
So, Frank has a very cold meeting with Billy out by the waterfront.
Billy offers to give Frank a new identity working for Anvil abroad, doing what he does best.
After the meeting, Frank drops the by the Lieberman household to apologize to Sarah for missing dinner.
He cant connect with his family, but he can jealously and longingly watch Frank do it.
Lewis is also looking for a connection.
It turns out OConnor never actually served in Vietnam.
Naturally, this upsets Lewis and he goes to confront OConnor at his home.
All of that anger hes felt since coming home is unleashed on OConnors body.
Is there some kind military thing Im missing?
This didnt really click with me.
Anyway, lets get to the good part.
You expect to see Dinah waiting inside, but shes not there; Agent Orange is!
This last minute reveal explains why Billy started looking for FrankbeforeDinah told him she knew he was alive.