After Going Home Jeff Got His Retirement And Married The Doctor's Daughter As The Daughter Wished 

They Got A Son 

They Called Him Jarred

Because Jeff Got These Powers He Transfered Them To His Son

Which Caused Him A Sickness 

After That on A Dark Night While Jeff Was Driving His Car Home With His Familly 

A Truck Appeared Suddenly And The Car Crashed

Causing The Death Of Him And His Wife Leaving Jarred Alone

His GrandFather Took Him And Raised Him To Be A Straight , Honest and a powerful man like his father

20 Years After Jarred Will Face His Toughest Challenges

Continuing In The Next Season of This Serie : 

Immortality Labs : The Creation