To inflict the greatest suffering , they plan to kill Helen and their daughter , Hermione .
Their execution certain , Orestes , Electra , and Pylades formulate a plan of revenge against Menelaus for turning his back on them .
To inflict the greatest suffering , Pylades plan to kill Helen and Pylades ' daughter , Hermione .
Their execution certain , Orestes , Electra , and Pylades formulate a plan of revenge against Menelaus for turning his back on them .