In series 3, Wilder unexpectedly changed strategy to a military VTOL jet aircraft, by taking over the firm of Ryan Airframe.

[1] At the end of the final Plane Makers series in January 1965, Wilder left Scott Furlong after a project for the Scott-Furlong Predator, a vertical takeoff aircraft, had failed, and took a seat on the board of a merchant bank while also collecting a knighthood.

Bored with being a gentleman of leisure, Wilder uses his influence with the bank on whose board he sits to become Joint Managing Director of an established building firm, Bligh Construction.

The first two series of The Power Game in 1965–66 chronicled his attempts to keep control in the face of opposition from the company's elderly founder Caswell Bligh (Clifford Evans), a stern, old-school patriarch who resents what he sees as Wilder's imposition on a family firm, and Bligh's ambitious but inexperienced son Kenneth (Peter Barkworth), who would prefer to be sole managing director, and free of his father's influence.

Wilder's private life came more to the fore in The Power Game; he has a long-running affair with a civil servant, Susan Weldon (Rosemary Leach), but is aghast when his wife Pamela also plays the field, with engineering expert Frank Hagadan (George Sewell).