Alex Trebek's tenure as host of ended Friday, with the airing of his final episode of the beloved game show, bringing one of the longest TV legacies to an end.The last episode, which was filmed back in October, served as a fitting tribute to Trebek, with a heartfelt segment honoring his indelible mark on pop culture and TV and saying «So long,» to the TV legend one last time.Set to Peter Allen's «Once Before I Go,» the tribute video featured footage from throughout his more than three decades as