Demetrius II - Basileus of Basileía tōn Seleukidōn from 145 BC to 138 BC
Demetrius II was one of the sons of Demetrius I Soter, brother of Antiochus VII Sidetes, and ruled the Seleucid Empire for two periods, separated by a number of years of captivity in Parthia.

In 147 BC, he overthrew Alexander I Balas and regained his fathers throne. However, Demetrius was not a popular king. The people of Syria had little respect for the young boy, who had come to power with the help of Egypt and Cretan mercenaries led by the ruthless Lasthenes.

In 139 BC, Demetrius was taken prisoner by MIthradates I of Parthia, and was held i captivity for 10 years. When he was released, the Seleucid Empire was only a shadow of it's former glory.

He would rule the remains of an empire for 3 years, before being defeated by yet another usurper - Alexander II Zabinas.
Demetrius II
King Demetrius II "the Victor" of the Seleucid Empire

Epithet: Nicator ("the Victor")

(1) Demetrius II 130-125 BC
AE unit Antioch
Obverse: Laureated and bearded head of Zeus right
Reverse: Nike holding wreath and palm branch walking left; BAΣIΛEOΣ / ΔHMHTΡIOΥ / ΘEOΥ NIKATOΡOΣ, ? monogram
Ref: SNG Spaer 2164 - 77; Hoover 1133; H...
(2) Demetrius II c. 143-142 BC
Obverse: diademed and draped bust right
Reverse: Eagle standing left on prow left, with palm branch over shoulder; to left, club surmounted by (TYP) monogram; to right, OP (date) above (ΓHP) monogram; ΒΑΣΙΛΕΩΣ__ΔΗΜΗΤΡΙΟΥ
Ref: SC 1959.4c.