Michael Dempsey (Michael Brandon) is a New York City cop who makes the Big Apple too hot to hold him. His superiors hand him over to the London Metropolitan Police, where he is teamed with Lady Harriet Makepeace (Glynis Barber). Hilarity Ensues as They Fight Crime!.
- Catch-Phrase: 'Life is tough and then you die.' Or was it 'Life's a bitch and then you die'?
- Da Chief: The long-suffering Detective Superindendent Gordon Spikings has the unenviable task of dealing with Cowboy Cop Dempsey"Dempsey, when the prime minister and the home secretary instructed me to set up this special unit to combat major crime, I did not expect to be wet nursing ex-Vietnam soldiers toting bazookas!"
- Female Flatfoot and Snarky Guy: She's a competent but single London cop (who is also titled hereditary aristocracy), he's a cleaned-up Dirty Harry type from the NYPD who gets unexpectedly made her partner for reasons that are never mentioned again after the pilot episode.(After Lady Harriet Makepeace addresses Lt Dempsey with the English pronounciation "Lef-tenant")Dempsey: You know how to say "Lootenant", don'tcha? Just put your lips together and go "OO".
- Gentleman Detective: A female version, as DS Harry Makepeace is more properly Lady Harriet Makepeace.
- Government Agency of Fiction: SI10, which fulfils a similar role to CI5, though it has a more rigid hierarchy and appears to be an actual police unit.
- Lie Back and Think of England: Referenced in "The Squeeze":"Besides, he's only with us for 12 months. Lie back and enjoy it. Think of England."
- Opposites Attract: Virtually everything about the two lead characters is different, but that doesn't stop their ability to deal with the bad guys or the Belligerent Sexual Tension between them.
- Wunza Plot: One's an American street smart loose cannon cowboy cop, one's a refined aristocratic proper young British police officer. Together They Fight Crime! and make sparks fly between them!
- Ye Olde Butcherede Englishe: Dempsey finds Makepeace at an archery range and launches into a fake monologue full of butchered English before Makepeace tells him to "stop butchering the language".