- All's Well That Ends Well
- Antony and Cleopatra
- As You Like It
- The Comedy of Errors
- Coriolanus
- Cymbeline
- Hamlet
- Henry IV, Part 1
- Henry IV, Part 2
- Henry V
- Henry VI, Part 1
- Henry VI, Part 2
- Henry VI, Part 3
- Henry VIII
- Julius Caesar
- King John
- King Lear
- Love's Labor's Lost
- A Lover's Complaint
- Macbeth
- Measure for Measure
- The Merchant of Venice
- The Merry Wives of Windsor
- A Midsummer Night's Dream
- Much Ado About Nothing
- Othello
- Pericles
- The Rape of Lucrece
- Richard II
- Richard III
- Romeo and Juliet
- Shakespeare's Sonnets
- The Taming of the Shrew
- The Tempest
- Timon of Athens
- Titus Andronicus
- Troilus and Cressida
- Twelfth Night
- The Two Gentlemen of Verona
- Venus and Adonis
- The Winter's Tale
After returning to the future, Eckels notices subtle changes in the atmosphere. The air feels strange and different. Further, he realizes that the sign on the wall of the office has changed spelling systems. Frightened of what may have happened, in this passage he sits down to find out what he could have stepped on to bring about these changes in his own time. The butterfly that he finds is an example of the very small creatures that Keith warned him against crushing. By accidentally killing this small, delicate insect, he has brought about changes of unknown scope to the…