Scanlan told PA that the post-watershed show "builds very, very nicely throughout all five episodes".
He added: "Come episode four and five it takes the storyline to a new level of darkness and black comedy.
"There's some very daring stuff, very ballsy stuff that I don't think has ever been done on Hollyoaks before, so for that reason alone I'm excited as hell."
The Irish actor has recently stated that he thinks that the dark side of his character is "what makes him interesting".
Scanlan has recently been flying to and from the set of Hollyoaks to Belfast in order to film BBC crime drama The Fall, alongside his soap co-stars Karen Hassan and Bronaugh Waugh.
He spoke of the challenges of working on two shows at once, saying: "For the first time in a long time I've been cast as a good guy. I'm going from hunting a serial killer to being hunted myself when I'm back on Hollyoaks. It's a massive change."
Hollyoaks Later will be shown across five nights on E4 this autumn.
Watch Emmett Scanlan discuss Brendan Brady's dark side below: