LONDON — Five years ago, the London Summer Olympics opened with a happy and glorious riff, Daniel Craig reprising his role as James Bond, escorting Her Majesty the Queen out to the royal helicopter, where it then wheeled above cheering crowds in the sun-splashed city below (hello!) and then under Tower Bridge to Olympic Stadium.

From the moment the “queen” and “007” jumped out of that copter, Mo Farah, the Somali-born British distance runner, has gone on to win the Olympic distance double-double thunderball, first in London and then in Rio, the men’s 5,000 and 10,000. For his efforts, the queen on January 1 of this year made Farah a Knight of the Realm. Pretty heady stuff.

The problem with encores, as 007 could readily tell you, is that it’s always tough to top the spectre of that last installment. So many critics. The world is not enough, as it were.