The extended cut of Suicide Squad is 13 minutes longer than the theatrical version, and that extra time helps salvage it a bit. Most of that time comprises additional footage from Harley Quinn's flashbacks throughout the film, including an extended view of Joker's escape from Arkham.
While his cronies wreak havoc on the medical center, Joker can be seen killing someone offscreen with a baseball bat, all while Dr. Quinzel is being wrestled onto an examination table. Then the two would-be abusive lovers have a discussion over the merits of Quinzel's therapy methods, before cutting back to the original version where Joker hurts her "really, really bad."
Another extended cut scene details what happened later that night, leading up to Quinzel's transformation into Harley Quinn, à la Ace Chemicals. The extended cut still falls short of filling all plot holes, however. Thankfully, the Ayer cut includes additional insight into the harsh realities of this "mad love," and more Joker in general.
