John Cleese's latest two characters complete special BBC radio show (5,4)

I believe the answer is:

loose ends

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'complete special bbc radio show' is the definition.
I can't tell whether this defines the answer.

'john cleese's latest two characters' is the wordplay.
'two characters' can mean two replacements for 'character'.
'john' becomes 'loo' (both can mean a toilet).
'latest' says to take the final letters.
'character' becomes 'e'.
'character' becomes 'ends' (I can't justify this - if you can you should give a lot more credence to this answer).
The last letter of 'cleeses' is 's'.
'loo'+'s'+'e'+'ends'='LOOSE ENDS'

Can you help me to learn more?

(Other definitions for loose ends that I've seen before include "Unfinished business" , "items to be settled" , "details yet to be explained" .)

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