Board Thread:The Reference Desk/@comment-68.226.217.163-20130524025728/@comment-188432-20130524174445

Hm, interesting challenge. I'll have to dig deep into the texts for you. If, though, you mean something usually spelled Tikkun, then I will say that the biggest connection to Judaism is likely in short stories, which unfortunately I have no ability to search.

Some likely sources are
 * The Last Days, which is possibly the most heavily-Jewish story in the whole of Doctor Who history.
 * Byzantium!, the most heavily-Christian story in the whole of Doctor Who history, which necessarily has a lot of Jewish content
 * Short Trips: Destination Prague, but particularly Life from Lifelessness

I'll take a look around, though, and see if there's a Tikun/Tikkun to be had. I wouldn't rule it out, since there is a Gehenna.