I am going to say this slowly; CBS does not care about your profits - it's chump change to them. It would cost them more money just to pursue the case, than you would have made (many times over). The entire notion that "copyright only matters if people are making profits" is bunk.
If I make "X", and you decide you like "X", so you make a version of "X" - you have infringed my copyright. I can control whether you make copies of my works. And that's what it is all about.
Copyright exists so that the copyright holder can choose what is done with their work. When you make copies of it, you are taking away that right, and deciding what is done with someone else's work.
This extends to derivative works.
For example, let's say I make "The X Show", and you like "The X Show", so you create, "The X+Y Show". Well, that's a derivative of my work ("The X Show"). You didn't come up with your own idea - you based your ideas on mine. That's a copyright infringement.
Yes, yes, I know; you put all the prims together and made the logo yourself and colored in between the lines. But, you didn't create the underlying concept that your work is derived from. And that's where the value is.
The safest bet is to make a generic thing, or to come up with your own intellectual property and hope that people like it.
And what's wrong with that?