A player's turn ends when a card is discarded by that player from their Hand.
That genuinely surprising turn did not end the Season 1 finale however.
The unusual, and welcome, turn of events for New York did not end there.
The character's turn ends when the player's attack is over or his action points are all used up.
His or her turn ends when the last remaining ship is bombed.
Whether the activity is completed successfully or not, the turn always ends after one card.
The turn ends once the seed is put into an empty hole.
The second number had to be called out within a certain time limit, otherwise the contestant's turn ended.
When the turn ended, Erika talked with her, the two alone.
His turn ends when he finally gets a "no" answer.