Milford, Conn. -- Don Fertman, chief development officer for the Subway sandwich chain, is the latest executive to go undercover on the CBS television series “Undercover Boss.” Fertman, a 29 year veteran of the restaurant chain, will be seen baking bread, stocking sandwich ingredients, slicing vegetables, taking inventories and serving customers, on the episode that airs Nov. 21, at 9 p.m. ET/PT on CBS.