Shamelessis turning 10 but dont expect the Gallaghers to grow up.

The hit Showtime series returns on Sunday for season 10, marking the beginning of thepost-Emmy Rossum era.

After popping up to help send off Rossum,Cameron Monaghan is now back full-time.

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Paul Sarkis/SHOWTIME

It wasnt an usual situation its just a sad one, admits Wells.

The challenge for the writing staff was, how are we going to reset the family?

Its an exciting thing to write about.

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Paul Sarkis/SHOWTIME

How will the Gallaghers behave without their leader?

Wells gave EW a preview of what is to come in season 10 for each character.

We were really excited to explore that relationship, says Wells.

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Paul Sarkis/SHOWTIME

And then how do they try and craft a relationship when there arent as many obstacles?

Were really enjoying writing about that.

From episode 4 on, its a huge part of whats going on.

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Paul Sarkis/SHOWTIME

Its no different for Ian and Mickey.

Sometimes children can act as the shotgun in the shotgun relationship.

Do they really belong together?

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Paul Sarkis/SHOWTIME

And thats what theyre really playing with throughout the season.

Both being in love with this child that they had together, can they make this work?

Debbie

Meet the new Fiona at least in her mind.

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Paul Sarkis/SHOWTIME

says Wells with a laugh.

Sometimes we elect ourselves.

Everybody else isnt too happy about her thinking shes actually in charge now.

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Paul Sarkis/SHOWTIME

He becomes a good citizen and tries to help some people in the neighborhood make some changes.

He decides maybe the best thing for him is civil service and tries out being a garbage man.

And Kelly is still around.

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Chuck Hodes/SHOWTIME

But he has not yet found his way.

Liam is trying to figure out how he belongs in the family, says Wells.

So hes a little bit of an afterthought.

Hes got his wingman back, declares Wells.

Frank has a best friend, which he really hasnt had, because hes such a narcissist.

He takes advantage of people so much that best friends dont stick around for long.

But hes actually got somebody that hes simpatico with.

Were following them as they find a way to scam their way through not working and trying to survive.

We were really lucky to have Luis [Guzman] back.

Hes fantastic, and the two of them together are a great comedic couple.

Kev and V

Speaking of great comedic couples, Kev and V are still going strong.

Well, Kev maybe not as much.

Kev is having a bit of a midlife crisis, reveals Wells.

Hes looking around like, Is this all that there is?

What are we going to do?

Hes going through his crisis and V isnt very interested in watching him do it.

Ill make this show forever as long as the cast members want to keep doing it, he declares.

The economics of the country kind of refuse to stop giving us material to make fun of.

So far, the cast has remained really excited to continue to do what were doing.

Shamelessreturns to Showtime on Sunday at 9 p.m.