Hank offers a brief history of histology by explaining the technological progress required to make histology a discipline in science today. He mentions key people and events in the discipline's development.

The brain is not yet understood by scientists completely. In 2013, the Brain Initiative was put forth and allocated $1 billion in research towards neuroscience to understand the brain more.

Researchers are trying to understand how the brain functions during sleep. All animals sleep and have a circadian clock. This clock tells the body when to sleep and when to wake.

Ray pulls out a map to plan a quick diversion to see the McDonald's in San Bernadino.

After Kanaalaq gets onto the plane with Charlie, he tries talking to her and asking her if she needs anything to make sure she was comfortable there with him.