Stephen

The battle of wits and logic is joined again! Spock and Q are in the midst of debating the fate of mankind when they are suddenly transported to somewhere in deep space. Then a curious personality change begins to take place, as Spock is overcome with giddy delight and Q begins to act serious, even logical. Masterfully performed by Leonard Nimoy and John de Lancie!

Ambassador Spock travels back in time to subtly warn Earth's inhabitants of impending doom while calling into question humanity's priorities. However, before the truth is told, the all-powerful being, Q, appears and reminds Spock that he is prohibited from interfering in Earth's history. Besides, Q doesn't see mankind as something worth saving.