Priam lived to see the downfall of his kingdom and was slain at last on the fatal night when the Greeks took the city. He had armed himself and was about to mingle with the combatants, but was prevailed on by Hecuba to take refuge with his daughters and herself as a suppliant at the altar of Jupiter. While there, his youngest son, Polites, pursued by Pyrrhus, the son of Achilles, rushed in wounded and expired at the feet of his father; whereupon Priam, overcome with indignation, hurled his spear with feeble hand against Pyrrhus and was forthwith slain by him

The Survivors 

Queen Hecuba and her daughter Cassandra were carried captives to Greece. Cassandra had been loved by Apollo, who gave her the gift of prophecy; but afterwards offended with her, he had rendered the gift unavailing by ordaining that her predictions should never be believed. Polyxena, another daughter, who had been loved by Achilles, was demanded by the ghost of that warrior and was sacrificed by the Greeks upon his tomb. Of the fate of the white-armed Andromache - she was carried off as the wife of Neoptolemus, but he was faithful to her for only a short time. After he had cast her aside she married Elenus, a brother of Hector, and still after returned to Asia Minor

Helen, Menalaus and Agamemnon

On the fall of troy, Menelaus recovered possession of his wife, who, it seems, had not ceased to love him, though she had yielded to the might of Venus and deserted him for another. After the death of Paris, she aided the Greeks secretly on several occasions; in particular when Ulysses and Diomede entered the city in disguise to carry off the Paladium. She then saw and recognized Ulysses, but kept the secret and even assisted them in obtaining the image. Thus she became reconciled to Menelaus, and they were among the first to leave the shores of Troy for their native land. But having incurred the displeasure of the gods, they were driven by storms from shore to shore of the Mediterranean, visiting Cyprus, Phoenicia, and Egypt. In Egypt they were treated kindly and presented with rich gifts, of which Helens' share was a golden spindle and a basket on wheels.

"...Many yet adhere
To the ancient distaff at the bosom fixed,
Casting the whirling spindle as they walk.
...This was of old, in no inglorious days,
The mode of spinning, when the Egyptian prince
A golden distaff gave that beauteous nymph,
Too beauteous Helen; no uncourtly gift.:

(Dryer - The Fleece)

Milton also alludes to a famous recipe for an invigorating draft, called Nepenth, which the Egyptian queen gave to Helen:

Not that Nepenthes which the wife of Thone
In Egypt gave to Jove-born Helena,
Is of such power to stir up joy as this,
To life so friendly or so cool to thirst.

(Milton - Comus)

At last, arriving in safety at Sparta, Menelaus and Helen resumed their royal dignity, and lived and reigned in splendor; and when Telemachus, the son of Ulysses, in search of his father, arrived at Sparta, he found them celebrating the marriage of their daughter Hermione to Neoptolemus, son of Achilles.

Agamemnon was not so fortunate in the issue. During his absence his wife Clytemnestra had been false to him; and when his return was expected, she with her paramour, Aegisthus, son of Thyestes, laid a plan for his destruction. Cassandra warned the king, but as usual her prophecy was not regarded. While Agamemnon was bathing previous to the banquet given to celebrate his return, the conspirators murdered him.