Fan Casting Brain Smartz Vol. 4: The Last Chapter (2022)

Life at the Shady Oaks Retirement Home is anything but dull for Dr. Einstein. He enjoys lively chess matches with the surprisingly sharp Hank The Grumpy Old Man and philosophical discussions with The Unchosen, who now relies on a wheelchair but remains mentally sharp. Their peaceful routine is disrupted by the arrival of Roger "The Rubixator" Rubinstein, a hyperactive Rubik's Cube champion with a wild theory. Roger, upon noticing Time Displacement's youthful appearance despite his caveman origins, becomes convinced he holds the secret to the Fountain of Youth. He badgers Einstein with his outlandish theories, determined to unlock the secret of eternal youth. Einstein, initially skeptical, is intrigued by Roger's boundless enthusiasm. He concocts a plan – a scientific expedition to a remote location hinted at in his old research notes, a place he believes might hold the key to cellular regeneration.