What is your single favorite TV episode of all time? Let's see who accepts this challenge. A single dramatic episode of a TV series. Your favorite hour or half-hour of television. And why. Mine? The Doomsday Machine from the Original Star Trek series. Why? Because it simply builds drama and satisfies better than any dramatic TV episode I have seen. It has great performances, a moral argument, terrific writing and directing, nice cinematography, terrific special effects (both versions) and an absolutely crucial score--the music makes it.