The actor told Zap2it that his character Mr. Fitz will renew his relationship with student Aria (Lucy Hale) in a future episode.
"Aria and I are back at it, with varying degrees of difficulty," he explained. "Still very much the blood is pumping as we kind of saw in the very end of the last episode. But again, [there are] more complications. It's not going to be easy."
He confirmed that the relationship will be put to the test when Aria's mother Ella (Holly Marie Combs) introduces Fitz to that new character Simone (Alona Tal).
"I interact with [Ella] a bit, especially in recent episodes," he said. "We've had similar storylines where we intersect. She introduces me to [Simone], who becomes another complication."
Lucy Hale previously suggested that Fitz and Aria's relationship will "continue and become more complicated".
Pretty Little Liars returns on January 3 at 8/7c on ABC Family.