Jeopardy is an american television game show 
I like watching it and trying to play along with them, what do you think of it?
Its one of my favorite shows to watch!  Another fact about the show is that Merv Griffin is the creator if you didn't know
Cool how long has it been around?
The first episode aired on march 30th 1964
Wow that's a long time ago. Is that the oldest game show?
Not much information on that but i did find that this show ran on the NBC network
Who was the most successful contestant?
No specific person listed, but this show does have 33 emmy awards so i would guess alot of very successful contestants 
I know the host is Alex Trebek, were there any others?