The Tragedy of October 19th, 2015

"The Ministry of Magic has just detected that your relationship with Katherine Green will be broken. Unauthorized magic was detected last night in the Crystal Cave by a famous dark wizard, Voldemort. Therefore, we are not responsible for the ending of any part of this relationship. In the meantime, you should be prepared, as the consequence for this breakup, if happens, is fatal. For such measures, an arrest warrant has been filed against possible perpetrators."

- Kingsley Shacklebolt's warning letter to Christopher Lewis just moments before the breakup

October 19th is a tragic incident involving with Christopher's first breakup that resulted in his death, which quickly spread to the student body at Hogwarts.

Dumbledore and Kingsley's Warning
After Christopher is discharged from the Hospital Wing the next day, he runs into Professor Cardigan, telling him he needs to see Dumbledore immediately. Respecting that, he went to his office, where he is forewarned by Dumbledore about his relationship with Katherine Green that could be broken.

Later that same day at lunch, Hedwig comes in screeching in despair while delivering a letter from the Ministry to him. He learns that Kingsley Shacklebolt, then-Minister for Magic, forewarns Christopher about the same thing Dumbledore told him.

The Breakup
When Christopher heads toward the Viaduct Bridge heading toward land, Katherine Green halts him for a second, walk towards him and tells him that they need to break up. The conversation was interrupted by a death eater from the Boathouse screaming Morsmordre. She then leaves, leaving Christopher devastated, leaning on the Viaduct Gatetowers.

However, the moment Christopher looks up again, he sees the Dark Mark floating in the air.

Behind the Scenes

 * In the books, there is a part where Christopher is knocked unconscious upon reading the letter, and Professor Slughorn comes immediately to administer the antidote. But in the films, this scene is replaced with Christopher immediately lost breath upon reading the letter, but nobody pays attention.
 * In the films, it is Bellatrix Lestrange who fires the Dark Mark from the boathouse, although this is never mentioned in the books, except for the location of which the screaming came from.

Appearances

 * Fifteen Reasons Why and the Order of the Phoenix 
 * Fifteen Reasons Why and the Order of the Phoenix (film)
 * Fifteen Reasons Why and the Case of Christ (Mentioned only) 
 * Fifteen Reasons Why and the Case of Christ (film) (Mentioned only 
 * Fifteen Reasons Why and the Lost Love  (Appears in flashbacks) 
 * Fifteen Reasons Why and the Lost Love (film)  (Appears in flashbacks) 
 * Fifteen Reasons Why and the Crimes of Crouch
 * Fifteen Reasons Why and the Crimes of Crouch: Part 1
 * Fifteen Reasons Why and the Crimes of Crouch: Part 2