On 13 <answer>March 2015</answer>, several members of the cast and crew, including Craig, Whishaw, Wilson and Mendes, as well as previous James Bond actor, Sir Roger Moore, appeared in a sketch written by David Walliams and the Dawson Brothers for Comic Relief's Red Nose Day on BBC One. In the sketch, they film a behind-the-scenes mockumentary on the filming of Spectre. The first teaser trailer for Spectre was released worldwide in <answer>March 2015</answer>, followed by the theatrical trailer in July and the final trailer in October.
When was the first teaser trailer of Spectre released?
March 2015