Question: The 21st Primetime Emmy Awards were co-hosted by Merv Griffin and the man who landed a starring role in what 1960s television show?

Context articles: Memory Game
Merv Griffin Entertainment
Headline Chasers
Bill Cosby
1st Primetime Emmy Awards
Merv Griffin's Crosswords
2nd Primetime Emmy Awards
The Merv Griffin Show
Merv Griffin
21st Primetime Emmy Awards

Memory Game (sometimes referred to as Joe Garagiola's Memory Game) was an American television game show that aired on NBC.
 The series – hosted by former baseball star and then-current "Today" personality Joe Garagiola – ran from February 15 to July 30, 1971.
 The show's creator and packager was Merv Griffin, and its announcer was Johnny Olson (his only announcing job for Merv Griffin Productions).
Merv Griffin Entertainment is an American production company founded by American media mogul Merv Griffin on May 13, 1996.
 It is a successor to Merv Griffin Enterprises.
 Its productions include revivals of recent franchises (such as "Dance Fever", revived in 2003 for the Freeform channel).
 Griffin's company is part of The Griffin Group.
 Merv Griffin Entertainment owns "The Merv Griffin Show" and "Dance Fever", but Sony Pictures Television handles television distribution rights.
 The television division was run by Yani-Brune Entertainment from 2005 to 2008; hand-picked by Griffin himself.
 In 2008, ShineReveille International made a deal with Merv Griffin Entertainment to distribute all of MGE programming overseas.
Headline Chasers is a syndicated game show that ran daily from September 9, 1985 to September 5, 1986.
 The series was hosted by Wink Martindale, with Johnny Gilbert serving as announcer.
 Martindale, who left "Tic-Tac-Dough" and was replaced by Jim Caldwell to take the position on "Headline Chasers", also created the series and was its executive producer.
 The show was a co-production of Wink Martindale Enterprises and Merv Griffin Enterprises with King World Productions, Griffin's partner for his other syndicated game show offerings, as distributor.
 "Headline Chasers" was recorded at TAV Celebrity Theater in Hollywood, the same studio which housed "The Merv Griffin Show" (which, at the time "Headline Chasers" premiered, was still in production).
William Henry Cosby Jr. ( ; born July 12, 1937) is an American stand-up comedian, actor, musician, and author.
 His start in stand-up comedy began at the hungry i in San Francisco; he then landed a starring role in the 1960s television show "I Spy".
 He was also a regular on the children's television series "The Electric Company" during the show's first two seasons.
The 1st Emmy Awards, retroactively known as the 1st Primetime Emmy Awards after the debut of the counterpart Daytime Emmy Awards, were presented at the Hollywood Athletic Club in Los Angeles, California on Tuesday, January 25, 1949.
 Only shows produced in Los Angeles County, California and aired in the Los Angeles media market were eligible to win.
 The awards were hosted by Walter O'Keefe who substituted for Rudy Vallée when he had to leave town at the last minute.
 A special award category was introduced and awarded to Louis McManus for designing the actual Emmy Award statuette.
Merv Griffin's Crosswords is an American game show based on crossword puzzles.
 The show was created by its namesake, Merv Griffin, who died shortly after beginning production on the series.
 Ty Treadway was the host, and Edd Hall was the announcer.
The 2nd Emmy Awards, retroactively known as the 2nd Primetime Emmy Awards after the debut of the Daytime Emmy Awards, were presented at the Ambassador Hotel in Los Angeles, California on January 27, 1950.
 Like the 1st Primetime Emmy Awards, Emmys were primarily given out to Los Angeles-based TV shows and stations.
The Merv Griffin Show is an American television talk show, starring Merv Griffin.
 The series ran from October 1, 1962 to March 29, 1963 on NBC, May 1965 to August 15, 1969 in first-run syndication, from August 18, 1969 to February 11, 1972 at 11:30 PM ET weeknights on CBS and again in first-run syndication from February 14, 1972 to September 5, 1986.
Mervyn Edward "Merv" Griffin Jr. (March 16, 1925 – August 12, 2007) was an American television host and media mogul.
 He began his career as a radio and big band singer who went on to appear in film and on Broadway.
 From 1965 to 1986, Griffin hosted his own talk show, "The Merv Griffin Show".
 He also created the internationally popular game shows "Jeopardy!" and "Wheel of Fortune" through his television production companies, Merv Griffin Enterprises and Merv Griffin Entertainment.
 During his lifetime, Griffin was considered an entertainment business magnate.
The 21st Emmy Awards—also known since 1974 as the 21st Primetime Emmy Awards—were handed out on June 8, 1969.
 The ceremony was co-hosted by Bill Cosby and Merv Griffin.