Here is the answer to the timeline, in which year did the following things take place?

Def Leppard's drummer Rick Allen lost his left arm in a car wreck.

Alex Trebek challenged his first contestant to answer in the form of a question as host of Jeopardy.

The only thing on Dan Akroyd's mind was the Staypuft Marshmallow Man in Ghostbusters 2, in 1984 and that year, Prince starred in the film Purple Rain, and he also directed the music video for this, here’s “When Doves Cry”