For 10 points, name this long time host of Jeopardy.
One individual jokingly claimed that this man died in a 2004 truck crash and has since been replaced by an identical robot. This man has appeared frequently in Colonial Penn Life Insurance commercials and recently appeared in a DirecTV commercial where hosts To Tell the Truth. In his early career he hosted the show Reach for the Top, while Will Farrell repeatedly portrayed this man in a Saturday Night Live skit alongside a Sean Connery impersonator. This host of the National Geography Bee took another job in 1984, where he replaced Art Fleming and works with announcer Johnny Gilbert. For 10 points, name this long time host of Jeopardy.
One individual jokingly claimed that this man died in a 2004 truck crash and has since been replaced by an identical robot.
Alex {Trebek}