... at least it could have happened according to this latest book, "The Writer's Tale":
http://news.bbc.co.uk/1/hi/entertainment/8441444.stm
Shall I put up the "BARROWMAN! [shakes fist]" picture, or shall I leave it to someone else?
Still, it could have been a valid excuse to hear JB sing as Captain Jack.
If, that is, we could hear his voice above the background music. 
http://news.bbc.co.uk/1/hi/entertainment/8441444.stm
Benny Andersson and Bjorn Ulvaeus from Abba were lined up for a musical version of Doctor Who spin-off show Torchwood, according to a new book.
In it, head writer Russell T Davies reveals that he was asked about the concept and told: "They have the two chaps from Abba on board."
Davies said after he had finished laughing he asked for clarification.
He was told: "Yep. Bjorn and Benny love Torchwood." But the idea never progressed beyond the early stages.
Shall I put up the "BARROWMAN! [shakes fist]" picture, or shall I leave it to someone else?

Still, it could have been a valid excuse to hear JB sing as Captain Jack.

