The Colloquium is regularly attend by members of the High-Energy and Nuclear Theory groups of those three institutions. Speakers are asked to provide a fairly general introduction into their respective topics for the non-experts in the audience but then may go into as much detail concerning their current research as is suitable for a nuclear theory seminar. Talking time is 45 minutes plus 15 minutes for discussions. A list of recent TNT Colloquia can be found here.
Information on reimbursement of speakers can be found here.