Kunal Nayyar, David Mizejewski, YG featuring Tyga, guest host Stephen “tWitch” Boss, guest DJ Loni Love

Kunal Nayyar ("The Big Bang Theory"); wildlife expert David Mizejewski; Poppin John ("World of Dance"); a viral-video family returns to perform again; YG featuring Tyga performs; guest host Stephen "tWitch" Boss; guest DJ Loni Love.