The "Shark Tank" cast is heartbroken over Mark Cuban's decision to leave the hit business and entrepreneurship reality series. "Like losing a brother, it's terrible. I know I'll get over it; I hope I'll get over it,

The Shark, who first joined the show as a guest investor in season 2 and became a full-time addition in season 3, will kick off his final season on the show when it premieres Friday, Oct. 18

Tears welled in Kevin O’Leary’s eyes as he recalled a time that Shark Tank costar Mark Cuban got him out of a rut. During a recent appearance on Who's Talking to Chris Wallace?, Kevin, 70, opened up about his time in the political sphere in Canada in 2017.