<Dd> Mr Shears's wife, who attempts to console Ed for a time after Christopher learns of his mother's death . </Dd> <Dd> An old lady, who is one of Christopher's neighbours, who offers information to help Christopher's investigation regarding his parents and Mr and Mrs Shears . </Dd> <Dd> Ed Boone's employee . </Dd> <Dd> Christopher's pet rat . </Dd>

The curious incident of the dog in the night time plot