Followed here from the Open Mic Thread, and hoping to give some constructive feedback.
I liked the gruff character at 0:37-0:50, I have no suggestions for it as it was consistent and had good range and depth.
I'm less fond of the opening sequence's investigator with the mild lisp, as it feels less natural with the dropped letters on the words. "Let us just humour this..." has a lateral (wet) lisp which flows naturally, but then the character changes his style of speech to gain a weird inflection ("a-solutely cl-eh-shes") and frontal (TH) lisp. After listening to it a few times it seems like there is a take cut between "moment/simply put". That seems to be where the character's style of speech changes. Lisps are based on natural tongue position, so it's likely that someone would have one of the two styles of lisp but not both at the same time. I honestly only picked up on it because my son had a TH lisp for a while.
There was a little bit of pop/peaking with the sports announcer (hard F "feel that one", hard D and T on "downtown). I'd suggest maybe lowering the quality a bit in this section. I know that sounds weird. There is usually a bit more ambient noise in an announcer's booth of a stadium which competes for the microphone, and more so for an announcer who is ringside at a fight. It's a bit nit-picky, I know the intent is to show vocal talent more than overall production. Just a thought for future demos.
I look forward to future demos! Cheers.