Finally, he FOILED a plot between Caliban and drunken sailors Trinculo and Stephano to take over the island.
But the magician soon showed his softer side. When Miranda and Ferdinand fell hard for one another, Prospero arranged an amazing illusion show for them.
And after Ariel gave him an earful for his treatment of Alonso and Antonio, he freed and even forgave them.
As the happy group left the island, Prospero had one last command for hard-working Ariel that must have come as a great relief to everyone - "calm seas"!
We are such stuff
As dreams are made on; and our little life
Is rounded with a sleep.
Prospero 4, 1.
You taught me language, and my profit on't
Is I know how to curse.
Caliban Act I Sc II