Don Adams Maxwell Smart, Agent 86 Actor Barbara Feldon Agent 99 Actor Edward Platt Thaddeus, the Chief Actor Iggie Wolfington Guest Star Peter Frank Guest Star Diahn Williams Guest Star Sid Haig Guest Star Larry Duran Guest Star Danny Thomas Guest Star Eric Brotherson Guest Star Karen Arthur Guest Star Larry Grant Guest Star Roy Dean Guest Star Leonard Stern Executive Producer Phil Hahn Writer Jack Hanrahan Writer James Komack Director