Editing Severus Snape (section)

==== ''Harry Potter and the Goblet of Fire'' ====
Snape's role in the fourth novel, ''[[Harry Potter and the Goblet of Fire]]'', is not substantially different from that of the previous three books. He is apoplectic when Harry is unexpectedly entered into the Triwizard Tournament. Later Harry accidentally falls into Dumbledore's [[Pensieve]] and views memories of several [[Death Eater]] trials from years before. At one point, Snape is named as a Death Eater by [[Igor Karkaroff]], but Dumbledore comes to Snape's defence, claiming that although Snape had indeed been a Death Eater, he changed sides before Voldemort's downfall and turned spy against him. Later, Dumbledore assures Harry that Snape's reformation is genuine, though he refuses to tell Harry how he knows this, saying the information "is a matter between Professor Snape and myself".<ref name="The Pensieve">{{HPref|book=4|chapter=30}}</ref>

At the end of the book, Dumbledore attempts to convince a disbelieving [[Ministry of Magic|Minister for Magic]], [[Cornelius Fudge]], that Voldemort has returned. As proof, Snape willingly shows Fudge the restored [[Dark Mark]] on his arm. He is subsequently sent on a secret mission by Dumbledore. This mission, as had been implied in ''Harry Potter and the Order of the Phoenix'' and revealed in ''Harry Potter and the Half-Blood Prince'', was to rejoin the Death Eaters and spy on Voldemort as a [[Double agent#Re-doubled agent|re-doubled agent]], while pretending to spy on Dumbledore on behalf of Voldemort.