I always loved the Dietrich character. He was like Spock, he knew EVERYTHING. When a suspect called him a "honkey", he gave the etymology of the word.
The German scientist who came to take it apart reminising about "if we developed it first"
"we did"
"Sure now we did, but then..."
In regards to Dietrich knowing everything, I remember one episode where he was explaining a party he went to to another cop. At the party, they placed the name of a seventeenth century French philosopher on your back. Then throughout the course of the evening, by asking questions of others at the party, you had to guess which philosopher.