User blog comment:Kuzlalala/Lala's Long but Orderly Put Theory about Phineas and Candace's Biological Father/@comment-3473686-20110807015100

I also had an idea like that, but it is now altered a bit for accuracy and just cuz:

My OC, Phelan Flynn, was from another planet (but is fully human). He and his brother (whom Phineas was named after) came to Earth to help protect it. He meets Linda and they fall in love. They also find it hilarious that they coincidentally have the last same last name!

They marry and have Candace and Phineas. Then, Phelan dies in a battle. Soon after, he is coincidentally hit by a ray by Doof (it has been proven that he built things before he met Perry I think). He then resurrects as a platypus, but is no longer the same person (as he says). He ends up in the OWCA and is adopted by the Flynn-Fletchers soon after.

I hope this makes sense!