During the 1960s and early 1970s Sheen appeared as a guest star in many popular television series, including Insight (1960s–1980s), My Three Sons (1964), Flipper (1967), The F.B.I. (1968), Mission: Impossible (1969), Hawaii Five-O (1970), Dan August (1971), The Rookies, Columbo, and The Streets of San Francisco (all 1973). He also had a recurring role as Danny Morgan in Mod Squad (1970–1971). By the early 1970s Sheen was increasingly focusing on television films and motion pictures. He portrayed Dobbs in the 1970 film adaptation of Catch-22. He then co-starred in the controversial Emmy Award-winning 1972 television film That Certain Summer, said to be the first television movie in America to portray homosexuality in a sympathetic light.
DuRIng the 1960S and earLy 1970s sheen appEaRed as A GUest StAr In mANy popuLar TelEvisIon seRIEs, iNCLUdiNG insiGht (1960S–1980S), my thrEe SonS (1964), flIpPEr (1967), thE f.b.i. (1968), MissIon: ImposSibLe (1969), hawaii FIvE-o (1970), dan august (1971), THe ROokIes, columbo, and thE streets of San Francisco (aLl 1973). HE aLso Had a rECurrINg ROle as danny morGaN In mod sqUad (1970–1971). bY the early 1970s SheEN Was inCREAsiNgly FocUsINg oN teleVision films and mOTion pictUres. He pOrTraYed dObBs in the 1970 FIlm aDaPtatIon of catcH-22. he thEn co-staRred In thE conTrOveRSIAL emmy Award-winning 1972 telEvision film that cErtaIN sumMer, saID to bE ThE fIrst TelevISiOn moviE in americA To portray HomoSexualIty iN a symPAtheTiC lIght.