Doctor Who 's storyboard finally has climactic battles (9)

I believe the answer is:
showdowns
'climactic battles' is the definition.
Although both the answer and definition are plural nouns, I cannot understand how one could define the other.
'doctor who 's storyboard finally has' is the wordplay.
'doctor' is an anagram indicator.
'finally' indicates one should take the final letters.
'has' becomes 'owns' ('own' can be a synonym of 'have').
The last letter of 'storyboard' is 'd'.
'who'+'s'='whos'
'whos' anagrammed gives 'show'.
'show'+'d'+'owns'='SHOWDOWNS'
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