SMERSH (James Bond)
SMERSH is a Soviet counterintelligence agency featured in Ian Fleming's early James Bond novels as agent 007's nemesis. СМЕРШ (SMERSH) is a portmanteau word from two Russian words: "SMERt' SHpionam" (СМЕРть Шпионам, Směrt Špionam) meaning "Death to Spies".
Though Fleming's version of SMERSH supposedly was modelled upon the real SMERSH organisation, which existed 1943-1946, the novels portray SMERSH as a massive Soviet counterintelligence organisation, much more resembling the real-life KGB, which aims its operatives abroad in subversion of the West, with the additional goal of killing Western spies, particularly James Bond of SIS. SMERSH's headquarters are stated to be in Leningrad, Soviet Union.
In the Bond film series, SMERSH is usually replaced with SPECTRE - a global terrorist organisation.
Read more about SMERSH (James Bond): Departmental Overview, SMERSH Agents