Short answers, pulled from the story.
Quintus Caecilius Metellus Numidicus was an ancient Roman statesman and general who traveled to Athens in his youth to study under the philosopher Carneades. He returned to Rome with a reputation for integrity and brilliant speaking skills that defined his public life.
Quintus Caecilius Metellus Numidicus held the office of quaestor in 126 BC, served as tribune of the plebs in 121 BC, became an aedile in 118 BC, and governed Sicily by 114 BC. He later commanded forces in Africa during the Jugurthine War starting in 109 BC and was elected censor in 102 BC.
The tribune Saturninus proposed a law to exile Quintus Caecilius Metellus Numidicus rather than face a confrontation between their supporters. Metellus departed into exile voluntarily and spent a year in Rhodes accompanied by the rhetorician Lucius Aelius Praeconinus or Stilo.
Quintus Calidius became the new tribune after the death of Saturninus and proposed allowing Quintus Caecilius Metellus Numidicus to return to Rome in 99 BC. His son Quintus Caecilius Metellus Pius gained the cognomen Pius thanks to faithful efforts supporting this proposal which duly carried.
Quintus Caecilius Metellus Numidicus returned to Rome and lived at his houses on the Palatine Hill and the Via Tiburtina for the rest of his days while intervening little in public affairs. Cicero dubiously reports a rumour that Quintus Varius ultimately poisoned him as populist tribune of the plebs for 91 BC.