Host Mo Rocca shows us the innovator creating superstrong thread from spider DNA; the boxing robot dodging your jabs; the tiny drone that keeps soldiers safe; and, when the sewing machine replaced the needle and thread.

Host Mo Rocca shows us the crime-fighting tether tripping up bad guys; the woman who started the blow-drying empire; window blinds powering your place; and, when the big wood saw was replaced with the sawmill.