When an entrepreneur brings in a new recreational sport to the tank, the sharks get a chance to suit up and ram into each other with reckless abandon; two brothers designed a fashion brand enabling the wearer to do good while looking good; and a coup... (more)le have a solution to the mystery of the missing sock. Also, an update on Mensch On A Bench that Lori Greiner and Robert Herjavec invested in during Season 6.