[Merlin series 4] Merlin panel at Kapow!Comic Con/London in April [news]
According to IGN's interview with organiser Mark Millar, there'll be a Merlin panel at the Kapow!Comic Con on either April 9th or 10th at the Business Design Centre, London. So far they've neither confirmed any specific Merlin guests at their website, nor published the event timetable.
