Hammond shows the crew a video that explains how Jurassic Park scientists acquired dinosaur DNA and cloned them. The video features Mr. DNA, a computerized DNA strand that explains what DNA is, illustrates its structure, and provides other details about it. This clip is an excellent introduction to DNA.
Hank explains that DNA stores our genetic instructions and illustrates how DNA is structured. He explains the parts of the Double Helix structure and uses a book to put into perspective just how many base pairs are tightly packed in each chromosome.
Sheldon gets an autographed napkin by Leonard Nimoy, famously known as Dr. Spock from Star Trek, from Penny. Nimoy used the napkin to wipe his face, which then contains his DNA. Sheldon states that he only needs an ovum to create clones of Leonard Nimoy.