The Plannertarium II event - in association with Media Week - will give a selected group of planners the opportunity to hear views from some of the TV industry's key figures.
Confirmed speakers include Channel 4 sales director Andy Barnes and Mike Parker, Channel 4 head of strategic sales and commercial marketing.
Other speakers will be Tess Alps, chief executive, Thinkbox; Cameron Saunders, UK marketing director, 20th Century Fox; Leon Jaume, executive creative director, WCRS, and Rory Sutherland, vice-chairman, Ogilvy Group.
Topics include rethinking space, ad break events, contextual advertising in the break and channel association in the break.
The event will be held on 9 July at The Vineyard at Stockcross, Berkshire.
To apply for a place and see images from last year's event, go to Channel4sales.com/theplannertarium
Applicants must register by 29 May.