Rick and Chum kick it with a rare pair of Pumas from 1968. But will a shocking sticker price leave them in the dust, or can they race their way to a deal? Next, Chum is blown away by a fan from the 1940s. Later, Rick reads into a collection of letters from historical figures, but it's some lab notes by Marie Curie that really leave him glowing. And finally, a Post Malone guitar inspires a smashing adventure for the guys. Will it bring them closer together, or wreck their day out?