Timeline is a page displaying all the events that happened in the Cahill world. Important events are displayed, as all the events from 1507-present are innumerable. This page mostly contains births, however.
- Damien Vesper is born.
- Gideon Cahill is born
- Olivia Cahill is born
- Luke Cahill is born
- Katherine Cahill is born
- Thomas Cahill is born
- Damien founded the Vespers
- Gideon Cahill dies
- The four Cahill children part their ways, making the Cahill branches.
- The Cahill Fire
- Luke and Jane go to England
- Thomas and Katherine go to Portugal
- Madeleine Cahill is born later that year.
- Jane Cahill becomes an acclaimed English poet and starts the Janus Branch.
- Katherine steals a Clue from Thomas and sails to Egypt to start the Ekaterina Branch and to leave Thomas swearing revenge.
- Thomas settles in Japan and builds the first Tomas stronghold.
- Winthrop Cahill is born.
- Luke starts the Lucian Branch.
- Vesper agents killed Olivia in a explosion in hopes of getting the Serum Formula as well as the Ring.
- Madeleine Cahill starts the Madrigal Branch
- Beatrice Cahill is born
- Grace Cahill is born
- Fiske Cahill is born.
- Grace Cahill goes to Casablanca, where General S. Patton steals Gideon's Ring, only to have Grace steal it back.
- Alistair Oh is born.
- Gordon Oh is assassinated
- Arthur Trent is born
- Hope Cahill is born.
- Damien Vesper III (Dave Speminer) is born.
- Nellie Gomez is born
- Sinead Starling is born.
- Jake Rosenbloom is born.
- Atticus Rosenbloom is born.
- Before Nellie Gomez is hired, the Vespers make an assassination attempt on Amy and Dan.
- Grace Cahill dies of cancer
- The Clue hunt occurs, with Dan and Amy Cahill finding all 39 Clues.
- Irina Spasky dies at age 44/45.
- Amy Cahill inherits Gideon's Ring
- Casper Wyoming tries to steal the Ring and to kill Amy and Dan Cahill but fails.
- Massive Cahill abduction begins. Natalie Kabra, Phoenix Wizard, Nellie Gomez, Fiske Cahill, Reagan Holt, Alistair Oh, Ted Starling and later Atticus Rosenbloom are kidnapped by the Vespers and Amy and Dan start searching for the mysterious items the Vespers want in order to "release" the hostages and stop the Vespers. Alistair Oh, Natalie Kabra, Isabel Kabra and Evan Tolliver die.
- Vesper One contacts Amy and Dan and blackmails them to steal priceless and historic items in order to "release" the hostages.
- The Vespers kidnap Atticus Rosenbloom, a Guardian and Dan's best friend. This was a murder attempt; this attempt fails.
- Natalie is killed in an attempt to destroy the Day of Doom machine.
- Vesper One kills Evan Tolliver
- Vesper one shoots Fiske in the shoulder.
- The Machina Fini Mundi was destroyed by Isabel Kabra and Vesper One.
- Isabel Kabra dies.
- Vesper Three defects back to the Cahills, and Vesper Four and Six get arrested. A majority of the Vespers get killed by Isabel (who switches to the good side at the last minute).
- Founders Media attacks Amy and Dan Cahill at William McIntyre's funeral. The Cahills know that Pierce and his followers have the Master Serum and want to control the world. Amy & company start looking for 7 ingredients from 7 ancient civilizations to make an antidote for the serum. Nellie makes a plan to rescue Sammy.
- The Outcast takes over Cahill Manor while Ian Kabra leads the Cahill family.
- Amy appears to have been killed.