Translated by Gilbert Murray. - Cf. An Introduction to Euripides' Alcestis by Murray
Admetus, King of Pherae in Thessaly.
Alcestis, daughter of Pelias, his wife.
Pheres, his father, formerly King but now in retirement.
Two Children, his son and daughter.
A Manservant in his house.
The Hero Heracles
The God Apollo
Thanatos or Death.
Chorus, consisting of Elders of Pherae.
The scene represents the ancient Castle of Admetus near Pherae in Thessaly. It is the dusk before dawn; APOLLO, radiant in the darkness, looks at the Castle.
Reference address : https://www.ellopos.net/elpenor/greek-texts/ancient-greece/euripides/alcestis.asp