ABC's "Shark Tank" Returns for Its 13th Season with Four New Guest Sharks Diving Into the Tank for the First Time 　　Emma Grede, CEO and co-founder of Good American and founding partner of SKIMS; Kevin Hart, actor, investor and entrepreneur; Peter Jones, the sole remaining original Dragon on the BBC's "Dragons' Den"; and Nirav Tolia, co-founder of Nextdoor, will appear individuall...