Which car company becomes a client of SCDP in season 5?

Jaguar becomes a client of Sterling Cooper Draper Pryce during Mad Men’s fifth season.

The account arrives after SCDP pursues Jaguar, the British luxury-car manufacturer, as a prestigious piece of business. Winning the account is especially important because the agency is still trying to establish itself after its break from Sterling Cooper. The campaign also creates a complicated professional and ethical storyline: Jaguar executive Herb Rennet uses his influence and expects personal favors in return for supporting the agency.

The Jaguar work brings the partners valuable prestige and revenue, but it also exposes the compromises behind advertising success. Joan Harris is pressured into sleeping with Herb so that the agency can secure the account, a decision that becomes one of the season’s darkest turning points. The campaign’s signature pitch centers on Jaguar’s appeal as a sensual, aspirational luxury product.

Cadillac, Ford, and Chevrolet are plausible automotive names from the broader history of American advertising, but they are not the car company SCDP lands in season five. Jaguar is the specific client tied to the season’s major agency plot.