Oh, how the Wizard of Oz would have been so different…
Who needs to see the Wizard when you’ve got a Gallifreyan Time Lord.
Need to get home to Kansas – hop in the TARDIS. Need some brains -the Doctor has plenty (and certainly more than any wizard). Need a heart – no worries, he’s got two. Need courage – become the Doctor’s companion and you can face anything.
So who killed the Wicked Witch? Who killed the Wicked Witch.