July 21, 2016
2:45 PM PDT

As Marty had followed Harmony over to Hill Valley Hospital, Harmony could barely take her eyes off this teenaged version of her friend's father. It was very uncanny how much alike the two Martys were. They could even pass for identical twins, had they been native to the same time period.

'So some people do still drive on the road in this day and age?' asked Marty.

'Yeah, about ten percent of the human population do,' replied Harmony. 'There are a few people who cannot afford to get their cars hover-converted. Then there are all people who think that flying cars can be a bit dangerous.'

'Can you fly a hover-converted car as soon as you get your driver's licence?' asked Marty.

'Yeah, you can,' replied Harmony. 'In fact, during driver's ed, they teach you you how to fly a car safely. If you opt not to hover-convert your car, then they teach you how to drive safely around the cars that are hover-converted.'

'Now, when I came to this era for the first time,' explained Marty, 'Mayor Wilson the Third was talking about how hover-converting cars can solve traffic problems. However, it turns out not to be case, as the traffic was jammed while we were driving to Hilldale from the downtown area. Believe it or not, but in that timeline, our family did end up living in Hilldale.'

'So that was the future of when you broke your hand in the accident with the Rolls Royce?' asked Harmony.

'Yeah, that was the one,' Marty said, nodding. 'Oh, I am so glad that that future never came to pass. According to what Jennifer told me, my future family was not a very pretty sight, to say the least. I also have a hard time believing that Hilldale has become such a crummy place to live in this era.'

'Yeah, some of my friends live in Hilldale,' Harmony said, nodding, 'and they're a little embarrassed to be from there. I almost think that the place does need to be torn down - except that it would suddenly leave hundreds of people homeless.'

'Well, maybe some people can't afford to live elsewhere,' suggested Marty. 'So I actually do become a rock star in the future?'

'Well, I really shouldn't tell you too much about your future,' Harmony replied, 'but, yeah, you become a moderately famous rock star. That's all I'm really going to tell you, though. Fortunately, they don't play any of your songs at the hospital. I think, if you heard one of your songs in the future, it could result in a time paradox. So we'll have to make sure that that doesn't happen.'

'Yeah, I guess you're right, Harmony,' replied Marty. 'There are special skyways for emergency vehicles, though? Because it looks like the police had no trouble taking Jennifer to our future home.'

'That's right,' replied Harmony. 'Well, here we are. We're almost at the hospital. We'll have to come in and look for your future. Now remember that you're supposed to be your son. Gee, I hope you don't need your thumbprint for anything. Your thumbprint would reveal straight away that you're Marty Sr, and that could lead to some rather tricky questions.'

'Oh, goodness!' gasped Marty. 'I didn't even think of that!'

oooooooooo

Marlene slowly walked into the ward where her father was staying. She had no idea where her brother was right now. She hoped that, without her brother present, her father would actually pay attention to her.

'Marlene!' Marty called out happily, as Marlene entered the room.

'Daddy!' Marlene called out, excitedly. Marlene then ran to hug her father.

'How are you feeling, sweetheart?' asked Marty.

'Uh, Dad, I want to know one thing,' Marlene said, slowly. 'You don't love my brother more than you do me, do you?'

'Of course not, sweetie,' Marty replied, hugging his daughter. 'Why would you think that?'

'Well, yesterday, you were completely ignoring me,' Marlene said, sighing. 'You only wanted to talk to my brother. You also have more in common with my brother, than you do with me.'

'Well, listen, sweetheart,' Marty said, softly. 'I'm sorry about last night, okay? I was just out of it, that's all. You should never feel the need to question my love for you, my dear child. You know, you can always come talk to me. I really wish you would open up more often. I mean, you can't expect me to read your mind.'

'Yes, Dad,' replied Marlene. 'So you are getting better? Oh, I really cannot stand to lose you. I love you dearly, Dad.'

'I love you, too, sweetheart,' replied Marty, as he embraced his daughter again.

Then Marlene saw her brother and Harmony walking into the room.

'Harmony!' called out Marty. 'My son! How do you do?'

'We're just fine, uh, Dad,' stammered Marty Jr.

'Whoa, wait a minute!' gasped Marty, with realization. 'You're not my son at all! You're me! You're me, from when I was a teenager!'

'Daddy, what are you talking about?' Marlene asked, confused. 'Of course he's your son - and my brother! What makes you think he's you as a teen? You really must still be feverish.'

'No, Marlene,' Harmony said, softly, 'your dad is right. This is your father, from 1986. My grandpa built a time machine a little over 30 years ago, and he came here to 2016 in a time machine.'

'Oh, no, Harmony!' groaned Marlene. 'Don't tell me that you're getting feverish, too. Your grandpa may be a genius, but there's no possible way he could have invented a time machine. There's no such thing as a time machine. It's only something you read about in science fiction stories, like Grandpa George used to write.'

'I understand that it's hard for you to believe,' Harmony said, softly, 'but we can prove it to you. You just need to come with us to Hill Valley Park, and we can show you.'

'Okay, then,' Marlene said, skeptically, 'let's say that your grandpa really did manage to invent a time machine. If this is really my dad from 1986, then how can this older version of my dad be here, too? For that matter, Harmony, Marty Jr and I shouldn't be here either.'

'It's the 24-hour ripple effect,' the younger Marty said, softly. 'If I stay here for over 24 hours, then you and your brother would cease to exist. There has got to be a way to prove to you who I am.'

'There is,' replied the elder Marty. 'My medical records can be accessed on the computer over there by pressing my thumb to the print pad. Marlene and Harmony, you two should go first - and then the younger me.'

'Uh, okay, then,' Marlene said, sighing. She then walked over to the computer, and commanded, 'Computer on.' Then Marlene pressed her thumb to the print pad, and the records of Marlene Stella McFly came up. 'Okay, Harmony, it's your turn.'

Harmony then pressed her thumb to the print pad, and the records for Harmony Clara Brown came up. Then the younger Marty pressed his thumb to the print pad, and up came the records for Martin Seamus McFly Sr. Marlene gasped, in amazement.

'Well, I guess I have no choice but to believe you,' Marlene said, sighing, 'as unbelieveable as it might seem.'

'Okay, you two wait in here,' Harmony told Marlene and the younger Marty. 'I'll go get some snacks from the vending machine. You like Cheetos, right, Marty?'

'Yeah, Cheetos is fines with me,' the younger Marty replied.

'Yeah, I love Cheetos,' added Marlene.

'All right, then,' replied Harmony, as she headed over to the vending machines.