What is it called when the audience has information the characters do not?

Identify whether each detail takes place in the story “the adventure of the speckled band” or in its film adaptation, the speckled band. roylott has a baboon and a leopard, which he brought from india. holmes and watson operate out of their shared apartment at 221b baker street. roylott has a baboon and a cheetah, which he brought from india. holmes and watson operate out of a fancy office with modern conveniences, such as an intercom.