Evan's guests this week are Sir Terry Matthews, serial technology entrepreneur, Harriet Green, chief executive of electronic components distributor Premier Farnell and Geoff Cooper, chief executive of builders merchant Travis Perkins.

With so many people now living in high-consuming industrial nations, and with many commodity prices increasing, Evan asks his business guests how they plan to economise in their use of raw materials. They also discuss building design and appraise the importance of form and function. Evan is joined in the studio by Eugene Kohn, co-founder and chairman of architecture firm Kohn Pedersen Fox Associates; Mark Price, managing director of supermarket chain Waitrose; Andy Bond, former chief executive and chairman of Asda.

Evan and his guests swap thoughts on contacts and contracts. Is it who you know that counts in business? Are informal networks the way business is allocated? Or do more formal arrangements now apply? Evan also asks his guests to reveal their greatest business regrets. Evan is joined in the studio by Will Butler-Adams, managing director of folding bicycle manufacturer Brompton Bicycle; Charles Cohen, chief executive of mobile gaming company Probability plc; Ralph Oppenheimer, chairman of steel trading company Stemcor.

This week Evan's executive guests hail from the worlds of banking, headhunting and advertising. He asks them about loyalty - or rather the seeming lack of it in business. Are companies generally looking for short-term relationships of convenience, with loyalty gone and promiscuity the rule? Evan also asks them how they measure how well they're performing. Evan is joined in the studio by Michael Morley, chief executive of private bank Coutts & Co; Robin Wight, president of communications agency Engine; Alistair Cox, chief executive of global recruitment firm Hays.

Evan's guest this week are Michael Birch, internet entrepreneur and founder of social networking website Bebo; Laura Tenison, founder and managing director of maternity and babywear retailer Jo-Jo Maman Bébé; Justin King, chief executive of supermarket chain Sainsbury's.

This week Evan asks his panel of top executives about the perils and the possibilities of running a fast-growing business. Many a company has spiralled out of control because of a failure to manage rapid growth - but what are the speed limits? They also chew over the role of the business lunch. Evan is joined in the studio by Clive Schlee, chief executive of sandwich retail chain Pret A Manger; Peter Bamford, chairman of SuperGroup, the fashion retailer behind the SuperDry brand; Giles Andrews, founder and chief executive of Zopa, an online lending service.

This week Evan asks his panel of top executives about the limits of automation. How far can they go in removing human beings from their business? Which processes are beyond automation? The panel also swap thoughts on the benefits of the corporate awayday. Evan is joined in the studio by Mike Lynch, founder and chief executive of the software company Autonomy; Colin Drummond, chief executive of waste management firm Viridor; Douglas Anderson, president and chief executive of the global travel management company Carlson Wagonlit Travel.