Scanlan, whose character is about to begin an affair with Ste Hay (Kieron Richardson), told PA that the opportunity to play such a complex person attracted him to the role.
He said: "I have never had the opportunity to play somebody as complex and as damaged as Brendan. He is without doubt a sociopathic, self-loathing, homophobic gay man and that in itself is a fascinating attraction for any actor to play.
"I think any actor would love a challenge, when you're doing a role if it pushes your boundaries and takes you out of yourself and allows you to experience different things. I think that's great. So coming up to do the part was exciting for me."
Speaking of his upcoming storyline, he added: "Because Hollyoaks is a 6.30pm show we had to find different ways to tell the story in a convincing way and leave most of it to the imagination of the audience.
"And in more cases than not, your own imagination is much more visual and more horrific than what you see on screen, so we tried to push things, drop little things, without actually showing anything explicit, but it was an incredible experience. Brendan's an extraordinary character to play."