Four years of such a tyrant was enough.

He was murdered by a Tribune of his Praetorian Guard.
THE CLAUDIAN EMPERORS.
CLAUDIUS (41-54).
A strong party was now in favor of returning to a republican form of government; but while the Senate was considering this question, the Praetorian Guard settled it by proclaiming CLAUDIUS Emperor.
Claudius was the uncle of Caligula and the nephew of Tiberius.

He was a man of learning and good parts, but a glutton, and the slave of his two wives, who were both bad women.

His first wife, MESSALINA, was so notorious that her name has became almost a synonym for wickedness.

His second wife, his niece AGRIPPINA, sister of Caligula, was nearly as bad.
This woman had by her former husband, Domitius, a son, whom she induced the Emperor to adopt under the name of NERO.