Andrew has spent months in the dark over the reasons for Heather's tragic demise, but with Ben Mitchell's guilt finally being exposed in the coming days, next week's episodes see the dark secret become the talk of Albert Square.
As we reported on Sunday, Jay Mitchell (Jamie Borthwick) becomes an outcast in Walford once the truth is out, as the locals are disgusted over the way he covered for twisted Ben.
Naturally, Andrew is one of the first people to angrily confront Jay, leaving the teenager terrified over his safety.
Viewers will see that Shirley Carter is also in Andrew's firing line, as he's shocked that the killer was under her roof all along.
Andrew struggles to accept that Shirley didn't know what was going on, leaving the pair at loggerheads once more.
With Shirley struggling, Andrew eventually makes peace with her - but soon drops a bombshell of his own by announcing that he's leaving Walford.
Fearing that he'll never be able to move on from his grief if he stays in the area, Andrew says a poignant farewell to the Square. Actor Ricky Grover filmed his character's exit scenes a few weeks ago.
While Andrew has decided on his future, what's in store next for Shirley is looking less certain. Can she ever forgive Phil and Jay after they betrayed her so badly?
EastEnders airs these scenes Monday, Tuesday, Thursday and Friday next week on BBC One.