When you're 13, inconsistencies in TV shows usually don't make an impression. With Time Tunnel, I found it so annoying that English was almost always used between foreign individuals, regardless of the time and place. I know it was necessary, but to hear the ancient Greeks, Trojans, Hebrews, as well as Russians, Mongols, Afghans, Spanish, French, Germans, Britons, and even aliens speak modern English to each other was quite unsettling. Strangely, the writers were inconsistent. For example, in Kill Two by Two, the Japanese soldiers spoke Japanese to each other at times.