The show I watched was Psych on the USA television network.
Watching the show without sound:
The relationship between the characters watching the show without the sound on seems to show that the two main characters were partners. One of the main characters through the body language seems to be the one doing all the talking. They were always together. One of the main characters seems confused about the statements the other one made from his facial expression. It seems through the non-verbal communication without the sound on that they had a great working relationship.
Watching the show with the sound on:
The two main characters were indeed partners. The main character Shawn was the one doing the most of the talking because he was a so-called psychic and he thought he had all the answers.  Gus was not confused but always gave funny facial expressions when Shawn spoke. Because Shawn and Gus were partners, they were always together. Watching the show with sounds, I observed even though one of main character talked constantly they had a great working relationship.
The assumptions I made was about the main character Gus who’s facial expressions seem to show he was confused about what his partner was saying. What I found interesting when watching the show with the sound on was that facial expression can mean many different things. That why people should never make assumption about what someone is saying because their facial expression may mean one thing but really mean something very different. 
I think it would not have been fair to do a show you watch often. You know how the characters interact with one another. Therefore, with or without verbal communication you could figure out what is going on. 
I learn through this assignment that you may or may not be able to read facial expressions, hand gestures, or other forms of non-verbal communication. This was a great experience. I enjoyed trying to figure out what the characters were saying without the sound on. I was amazed that I was able to figure some of the non-verbal communication when the sound was off and on. 
Reference
Adapted from O’Hair & Wisemann, 2009. Real Communication. p.128.