Dick Costolo - 'Silicon Valley'

The 52-year-old former Twitter CEO, who serves as a consultant on HBO's hit comedy series, talks about his days in Chicago's Second City comedy troupe ("Steve Carell and I were in the same group"), the highs and lows of his time running one of the world's leading social networks and how he came to be a part of Mike Judge and Alec Berg's writers' room.

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