In William Shakespeare's play Hamlet, Gertrude is Hamlet's mother and Queen of Denmark. Her relationship with Hamlet is somewhat turbulent, since he resents her marrying her husband's brother Claudius after he murdered the king. From Wikipedia
The Royal Shakespeare Company and Factory International's reimagining of Hamlet fuses Shakespeare’s tragedy with Radiohead’s Hail to the Thief in a 100-minute drama, dance, and live music production.
