Derrick or not Derrick? That is the question

So, I knocked on the door and all he said was come in. I shouldn't be nervous but part of me wondered if it was really him or not. I just stood there like an idiot staring at the back of him while he cooked. Does not look like he has changed much but an apocalypse can change people. It changed me. I am not the same as I was when I last saw him. Nothing bad just able to handle situations a lot better then I used to.