'Torchwood' will soon exist in yet another fictional universe of Mankind's creative spark. Born in the TV Universe, it has a mirrored existence in the world of literature with tie-in novels and now will be part of the radio world as well.
Radio 4's "Afternoon Play" will broadcast during a day of programming dedicated to the CERN project. The 'Torchwood' story has Martha - still a member of UNIT, I would assume - calling on the team to check out the weird stuff happening at the CERN nuclear facility in Switzerland*. (This will take place either during June or July.)
(Outpost Gallifrey calls it Team Torchwood's first international adventure, but that's not true. Even though we didn't get to see them do it, the team went to Tibet at the request of Prime Minister Harold Saxon, which kept them out of the way when he took over the world in the 'Doctor Who' two-part finale for last season. The fact that the Doctor hit the magic reset button and negated most of everything that happened during the year Saxon reigned over Earth doesn't mean it never happened.)
The radio play features the vocal work of John Barrowman, Eve Myles, Freema Agyeman, and Gareth David-Lloyd. But because Burn Gorman and Naoko Mori are no longer in the cast and were not listed for this production, it is assumed this adventure will take place after the events in the 'Torchwood' second season finale. However, the scriptwriter Joseph Lidster says that Owen and Tosh will still play a role in the story. So they may be involved but unheard from during the play, and that would place this story line in the Torchwood timeline before the deaths of their characters.
There's always a chance that this adventure will be mentioned at some point in the future of the TV series. (At least, I'm hoping that there will be another season of 'Torchwood'!) But if so, then it will be an unseen adventure in Toobworld. The radio version will be a mirror universe depiction of the same event (in much the same way as we treat the 'Star Trek' movies when it comes to their place in the TV Universe).
*Here's an extra Tiddlywinkydink for you, since I missed out twice last week while on a mini-vacation at the Lake:
The European Organization for Nuclear Research known as CERN is the world's largest particle physics laboratory, situated in the northwest suburbs of Geneva on the border between France and Switzerland. The convention establishing CERN was signed on 29 September 1954. From the original 12 signatories of the CERN convention, membership has grown to the present 20 member states. Its main function is to provide the particle accelerators and other infrastructure needed for high-energy physics research. Numerous experiments have been constructed at CERN by international collaborations to make use of them.
- from Wikipedia