Supergirl has tackled its fair share of daddy issues, and boy do they love the big returns. 

Jeremiah was a major focus of Supergirl Season 2, and now we've been introduced to both Maggie's and J'onn's fathers on Supergirl Season 3 Episode 3.

One of those stories had a happy ending, while the other one, sadly, did not. 

Let's start with J'onn's journey to Mars. 

For years, J'onn has lived with the belief that he was the last Green Martian. When M'gann showed up, he briefly thought she was one, but it turned out she was a White Martian. Eventually, he got over it, but that was a major let down for him. 

He has his family on Earth, and he loves Alex and Kara like his own daughters, but being the last of his species is lonely. His entire family was brutally wiped out, and he assumed he'd never see any of them again. 

Well, that all changed when M'gann begged him to come to Mars. 

J'onn's father is alive. 

Not only is J'onn not the last Green Martian, but the one other Green Martian that still exists is his flesh and blood. That's pretty crazy, right? 

J'onn: My father thinks I'm a coward.
Kara: Then he doesn't know you. 'Cause the man I know has dedicated his entire life to making sure what happened on Mars never happens anywhere else. So go in there J'onn. Show your father who his son really is.

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Of course, it wasn't an immediate happy reunion. 

J'onn's father assumed he was just a White Martian in disguise, and really, who could blame him? They've been trying to break him for years; it's surprising they never actually tried that tactic before. 

Thanks to some help from Kara, J'onn was finally able to get through to him, and he shared a heartwarming memory complete with his own two daughters on his birthday. 

What happened to his family was tragic, but the question is, what happens now?

M'gann stayed on Mars to continue the fight with the resistance, but J'onn's father came back to Earth with him. Is he going to be a part of the team moving forward?

They have so much lost time to make up for; it would be fun to see the two of them getting reacquainted while Myr'nn adjusts to Earth. His learning experience could be like Mon-El all over again. 

I'm not exactly sure how he will fit in on a regular basis or how long he will stick around, but I hope now that he's back it doesn't somehow end tragically. 

What about that adorable wedding shower Eliza threw for the girls? 

We finally learned the whole story that went down between Maggie and her dad. He never even gave her a chance to explain before packing a suitcase and abandoning her at her aunt's house. 

That's pretty traumatic, and Maggie is a big person for making an effort to reach out after all these years. 

When he got off that bus and revealed he'd been keeping tabs on her and following her cases, I hoped maybe it would end better than it did. 

Why did he come at all if he still wasn't over his daughter's sexual orientation? He knew he was going to a wedding shower for two women, so there was a good chance they'd kiss at some point. 

Maybe he told himself he was over it, but seeing them together was too overwhelming for him? Whatever it was, he should have just stayed away rather than risk hurting her worse than he already had. 

He did attend, and he keeps a picture of her in his wallet, so perhaps there is still hope for them to reconcile someday. He says he knows how to Google, so how about finding a therapist to help work through his issues and learn to embrace his daughter for who she is?

Thank you for coming to the shower. You gave me an amazing gift. You showed me that I'm not that scared little girl in that picture anymore. I'm an adult woman, and I am happy in my own skin. And I am so fortunate that I am surrounded by people who value and cherish me. I finally understand that I don't need you to see me, or to get me, or to even like me. I don't need anything from you. I'm already good.

Maggie

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If not, well, Maggie doesn't need him. For now, at least, she has the woman of her dreams, and she doesn't need anything else. But we know that's not going to last. The writing is on the wall. 

How long can Alex keep lying to herself? She wants kids, and it seems like she wants them pretty badly. Is she willing to give that up to be with Maggie?

She might think she is, but if she's not honest with herself, she'll wake up one day regretting her choices. Alas, we know this will mean the end of Sanvers. 

It's sad, but it's a real issue that couples face all the time. They love each other, but they want different things. Unless one of them changes her mind and can be happy with that decision, the relationship is doomed. 

When Maggie leaves, Alex will be devastated for awhile, but hopefully, she will find happiness someday with someone new who wants a family with her. 

Final thoughts: 

• J'onn's classic car/spaceship was amazing. Also, it's funny how concerned Kara was about the lack of seatbelts considering she's indestructible. 

• Kara driving said car into White Martian headquarters blasting Britney Spears was the laugh out loud moment of the episode. Seriously, who didn't crack up at that?

Your turn! What did you think of the return of the dads? Will J'onn's father be sticking around for awhile? 

Don't forget, you can watch Supergirl online anytime!

Stacy Glanzman was a staff writer for TV Fanatic. She retired in March, 2019.