As the human brain evolved, early man gained an incredible evolutionary advantage-- the power of language. It brought humans closer together and led to a higher form of creativity. Cave paintings, sculpture, and decorative tools sprung from man's hand. Today, the human mind still drives the species-- but is that enough to guarantee survival on the evolutionary tree?
| Name | Type | Role | |
|---|---|---|---|
| Walter Cronkite | Guest Star | ||
| Peter Nicholson | Director |