Judge on wretched TV show (9)

I believe the answer is:

countdown

I'm a little stuck... Click here to teach me more about this clue!

'tv show' is the definition.
(I've seen this before)

'judge on wretched' is the wordplay.
'judge' becomes 'count' (I've seen this before).
'on wretched' becomes 'down' (I can't explain this - if you can you should believe this answer much more).
'count'+'down'='COUNTDOWN'

Can you help me to learn more?

(Other definitions for countdown that I've seen before include "prelude to firing" , "Pre-launch procedure" , "comes to nothing" , "Run-up" , "TV quiz show" .)

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.