Shameless' Justin Chatwin Previews Steve's Quest to Win Back Fiona and His 'Sticky' Mess

In this Sunday’s episode of Shameless (Showtime, 9/8c), Steve is finally back, and he’s got just one thing on his mind: Fiona. Though he’s by no means been a monk while he was off in South America, the scheming charmer is still hung up on the one that got away, his portrayer Justin Chatwin tells TVLine. Emmy Rossum’s character “is his true love.”

Showtime Renews Shameless, House of Lies and Californication

“He sees their future together,” the actor continues. “He doesn’t doubt it. He just sees it.” In fact, Steve is so focused on wooing his girl that he never even imagines that maybe she won’t want to welcome him back with open arms. “He’s so bold and impulsive, he never thinks things through. He doesn’t go back like, ‘Yeah, maybe it’s going to be a big issue.’”

Fiona’s reluctance to jump into a relationship once more might have something to do with the host of problems Steve brings home with him from his trip. “[He was] being an entrepreneur in South America, if you know what I’m saying,” Chatwin teases, “with his wheeling and dealing ways.”

Ask Ausiello: Spoilers on Shameless and More!

Bigger business gambles mean bigger danger, which leads to Steve getting into “a really, really sticky situation, worse than [with] Tony the cop and all that stuff in the first season,” he hints. It’s so sticky, in fact, “that he has to come back to America because of what he’s got himself stuck in.”

And he’s not returning alone. An attractive friend from his trip aboard, who is “part of that complication,” will be accompanying him, reveals executive producer John Wells.

Nurse Jackie Exclusive: Season 4 Poster Reveals Jackie is Out of Tricks, Excuses and [Spoiler]!

Needless to say, Steve’s quest to win back Fiona will not be an easy one, especially since the eldest Gallagher has done her best to put her ex out of her mind. Unfortunately, her string of light-hearted relationships – including one with James Wolk’s investment banker, who returns this week – may not have worked as well as she had hoped.

“She’s pretended that [Steve was] not that important and [she] wanted to keep him at a distance,” explains Wells. “And now we see everything that she does to try and get over him and what’s working and what’s not working.”