Hosted by late-night's Jimmy Kimmel, this season will feature both celebrity contestants playing for the charity of their choice and frontline heroes trying their hand at a $1 million prize. In addition to lifelines "Ask the Host," "50/50" and "Phone a Friend," contestants playing on "Millionaire" can invite an expert guest to help them answer questions. It could be a relative, a beloved teacher or a famed trivia expert – anyone they want – to help them win as much money as they can.