After getting her start in coffee shops Joni Mitchell went on to set a new standard, marrying music and lyrics with such songs as “Both Sides, Now.” While her early material is often categorized as “folk,” she became a household name with music that defies categorization.

每个人都有一把独特的嗓子，反映我们的思想和情感。科学家发现人类的声音就如指纹一样，每个人都不同，而人类会透过声音去拣选朋友、情人、领袖，所以声音对人际关係起了决定性的作用。《人声的奥秘》会剖析人声如何形成、如何反映人的各种情绪、以至影响人与人之间的沟通。节目更会探讨现时最新的电脑彷製人声技术，细看科学家如何为电脑及机械人增添人性化的声音。然而直至现时为止，尚未出现一种可以由机器自主表达人类複杂情绪的智能声音，即使将来这方面的技术成熟，又是否代表机器可以取代人声所独有的感染力？

The holidays take a hit as Kaz juggles the Secret Santa competition, his Aunt Angelique's visit and his nemesis Arcangelo's Christmas plotting.