|Portrayed by||Sean Pertwee|
|First seen||Step Nine|
|Last seen||Ears to You|
Gareth Lestrade is a Scotland Yard Inspector, and a former partner of Sherlock Holmes.
According to Holmes, Lestrade was "the best of a bad bunch" among those few Scotland Yard detectives who agreed to work with him. Although Lestrade was, in Holmes's words, "utterly adequate" as a detective, Holmes was often scathing about his limitations, so the two men were not close, despite their professional respect for each other.
Because Holmes always preferred to work anonymously, he allowed Lestrade to take the credit for solving their cases, and eventually Lestrade became addicted to the glory that accrued. Lestrade himself said that those days were the best time of his life, though he denied being a glory hound, and instead simply reveled in the satisfaction of being a successful detective.
After Holmes was incapacitated by his drug addiction, Lestrade found himself struggling to work on his own and, according to his superior, DCI Tompkins, began to cut corners for the sake of closing his cases.
This came to a head when Lestrade investigated the murder of Mary Pendry, whom her husband, Lawrence, claimed had been killed by a home intruder. Lestrade suspected Lawrence himself, but could not prove it. Lawrence's father, Warren Pendry, a media mogul, employed his newspapers, and a substantial amount of money, to "paint a very ugly picture" of both Lestrade and Scotland Yard, forcing Lestrade's superiors to suspend him.
|Season two appearances|
|Step Nine||Solve for X||We Are Everyone||Poison Pen|
|Ancient History||An Unnatural Arrangement||The Marchioness||Blood Is Thicker|
|On the Line||Tremors||Internal Audit||The Diabolical Kind|
|All in the Family||Dead Clade Walking||Corpse de Ballet||The One Percent Solution|
|Ears to You||The Hound Of Cancer Cells||The Many Mouths of Aaron Colville||No Lack of Void|
|The Man With the Twisted Lip||Paint It Black||Art in the Blood||The Grand Experiment|