Any person who has or is considered to have great powers of observation and deduction.
A series of novels by Arthur Conan Doyle about a consulting detective with keen observational awareness, astute logical reasoning and professional forensic skills; also related media based on the books, such as movies.
The fictional detective who is the protagonist of the series.
One who ropes goods; a packer.
Synonym of outside man (“accomplice who locates a mark to be swindled by a confidence trickster”)
An undercover informer.
Any of a variety of monsters with tentacles that they use to capture victims.
A person hired by a gambling establishment to locate potential customers and bring them in.