My advice to all of them has been that when opportunity knocks, eagerly swing the door wide open.

WHITEHOUSE: Every Opportunity

An emergent strategy involves the decision to follow a new path when opportunity knocks unexpectedly, or when an unexpected roadblock arises.

FORBES: How Economics Can Fix Your Life

In 1998, Ms Yates learned that Opportunity Knocks presenter Hughie Green was her biological father, not the broadcaster, Jess Yates, who had brought her up.

BBC: A life in the spotlight

Last year she had to come to terms with the discovery that her biological father was Hughie Green, the creator and presenter of the television talent show Opportunity Knocks.

BBC: News | Entertainment | Yates loses custody battle

When McPherson wasn't answering questions about Katie Holmes' guest turn on sophomore drama Eli Stone, he focused on the fall's two newcomers: Life on Mars, a British remake about a modern-day police detective who wakes up 35 years in the past, and Opportunity Knocks, a chance-of-a-lifetime game show from star Ashton Kutcher.

FORBES: Jimmy Kimmel Live

This presents an excellent opportunity for us players to give our bodies a rest and recover from the niggles and knocks that we inevitably pick up over the course of the season.

BBC: Geoff Griffiths column