While I'm asking difficult questions...

[nwhyte]

...I could never get the missing line.

Yes, I know what the canonical version is, but I don't really believe it. What should it have been?

(And I never understood why it was always listed as "Boss Cat" in the BBC TV schedules, but that would be an ecumenical matter.)

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Top Cat!
The most effectual
Top Cat!
Whose intellectual
Close friends get to call him TC...
[dah dah dah dah diddle de dee]
Top Cat!
The indisputable
Leader of the gang!
He's the boss!
He's a VIP!
He's the championship!
He's the most tip top -
Top Cat!