During the season finale of Arrow, Diggle and Lyla Michaels took over A.R.G.U.S., freeing Task Force X to work for them and stop Amanda Waller's attack on Starling City.

Along the way, of course, they had to break the bad-guys-who-do-good out of their cells, and in the TV version of the scene, it essentially stopped once they started to open doors.

That said, there were reports (and even a team picture) that indicated "Deranged Squad Female," better known to comics fans as Harley Quinn, might have had a little cameo in the finale that was cut -- and on the Blu-ray, you can see that is, indeed, the case.

"I don't know if she's going to be involved in Season Three but the high-pitched voice in Episode 16, "Suicide Squad," was absolutely Harley Quinn," Amell told a fan at Phoenix Comic Con. "I didn't know about any of this, by the way, because I wasn't in that scene...but I'm a fan and I remember seeing that preview and feeling like I should have known that this was going to happen!"

Diggle may have wanted all the help they could get, but when Deadshot told him that one cell was too dangerous to open, Oliver's bodyguard took his word for it. Inside? Harley (again voiced by Tara Strong but played by someone else, possibly Cassidy Alexa, who provided the body for Harley's previous cameo in "Suicide Squad"), calling out to Diggle that she "wants to play."

Probably better he didn't let her out.

It's worth the cost of the DVD, though, to hear her call Diggle "Chocolate Puddin'" and to see his reaction when she does so.

Arrow: The Complete Second Season is out on DVD and Blu-ray combo pack on Tuesday, September 16. The package includes deleted scenes, mini-documentaries and the Arrow: Year One special that recaps Season One.