The compiler had great luck (or is a genius at spotting opportunities) with the names: three of the hosts have the same length first and last name. Conan O'Brien is anomalous, but could be paired up with Tonight Show. The could go opposite Jay, leaving only Leno on the loose (for which host comes to the rescue).
Solving time: 8 mins (no cheating)Theme
Clue of the puzz: 22d lea {Good place to have a cow?}
58a The, 59a Tonight Show {TV home for this puzzle's five featured TV personalities}. Every 53a host {Desk job at 58 & 59-Across?} in the show's history appears in the grid:
1a Steve, 66a Allen {First in a series of five TV personalities (1954-57)}Solution
6a Jack, 65a Paar {Second in a series of five TV personalities (1957-62)}
34a Johnny, 35a Carson {Third in a series of five TV personalities (1962-92)}
19a Jay, 22a Leno {Fourth in a series of five TV personalities (1992-2009)}
17a Conan O'Brien {Fifth in a series of five TV personalities (starting June 1, 2009)}

Grid art by Sympathy [about the grid colors]
Crucimetrics
New To Me
Compilers John Farmer / Will Shortz Grid 15x15 with 41 (18.2%) black squares Answers 78 (average length 4.72) Theme squares 66 (35.9%) Scrabble points 284 (average 1.54) Letters used ABCDEFGHIJKLMNOPQRSTUVWXYZ
29d Ince {Early film director Thomas H. ___}. Thomas H. Ince (1882–1924) did pretty much everything there was to do in silent films: acting, directing, producing and writing. His mysterious death on board William Randolph Hearst's luxury yacht became the subject of The Cat's Meow in 2001.
43d Ashton {Actor Kutcher}. Ashton Kutcher is the TV and film actor best known for portraying Michael Kelso in That '70s Show. He's married to Demi Moore.
45d Olsens {Twins Mary-Kate and Ashley}. The Olsen twins are identical, which helped them get work from a ridiculously young age: child labor laws could be gotten around by swapping one for the other when they played Michelle on Full House.
54d Rona {Jaffe or Barrett}. Rona Jaffe (1931–2005) was an American novelist, famous for a controversial novel about the dangers of Dungeons & Dragons, Mazes and Monsters. Rona Barrett is a retired Hollywood expert. In one of those nice coincidences, I found a clip of her with Jack Paar (but not on The Tonight Show) from 1973.
57d Owen {Wilson of "Zoolander"}. I hadn't heard of Zoolander before, knowing Owen Wilson mostly for his performance in Wedding Crashers. Owen and Ben Stiller play male models Hansel and Derek.
Noteworthy
24a aesir {Norse race of gods}; 3d erns {Sea eagles}. Answers like these make me think we wouldn't have seen this puzzle on a Monday, were it not for the tie-in. I only know these words from crosswords: aesir because its singular as makes a helpful fragment in advanced cryptic cluing; and ern(e)s because it's a common answer in every type of puzzle where it's deemed acceptable.42a Deneuve {French actress Catherine}. The performance I most associate Catherine Deneuve with is her portrayal of the theater director's wife in Le Dernier métro (1980).
22d lea {Good place to have a cow?}. I like this clue, though the answer is again a bit obscure. Did the expression "to have a cow" start with Bart Simpson, or did he just popularize it? Wikipedia thinks don't have a cow predates Bart and is possibly of British origin (which I doubt as I never heard it before The Simpsons came on the scene).
60d STL {Letters on a Cardinals cap}. Coincidentally, I chose an STL hat as an image in yesterday's blog. So it shouldn't be difficult to find it again.The Rest
10a IBM {"Think" sloganeer}; 13a errors {Dropped flies and bad throws, in baseball}; 15a alee {Sheltered from the wind}; 16a NEA {Teachers' org.}; 20a TDs {Football six-pointers, for short}; 21a in ages {Since way back when}; 23a lesson {Teacher's teaching}; 28a intimates {Closest friends}; 30a at peace {Free from worry}; 33a one {Two halved}; 40a tam {Scot's cap}; 43a abominate {Despise}; 48a snag {Minor hang-up}; 49a solos {Unaccompanied performances}; 50a gibe at {Taunt}; 54a reduce {Decrease}; 55a pro {Con's opposite}; 61a -oon {Suffix with ball}; 62a ante {Opening stake}; 63a on time {Prompt}; 64a nos {Telephone book info: Abbr.}.
1d sect {Religious offshoot}; 2d trod {Trampled}; 4d VOA {U.S. broadcaster overseas}; 5d Ernie {Bert's "Sesame Street" pal}; 6d jargon {Tech talk, e.g.}; 7d alien to {Not consistent with, as a way of thinking}; 8d cees {Middling grades}; 9d Ken {Author Follett}; 10d in jest {How quips are delivered}; 11d beanie {Close-fitting cap}; 12d mayors {City hall leaders}; 14d sons {Daughters' counterparts}; 18d Basie {Bandleader Count ___}; 23d lien {Property claim}; 24d a mean {"He doesn't have ___ bone in his body"}; 25d Maj. {Not minor: Abbr.}; 26d I to {"How was ___ know?"}; 27d mph {Speed limit abbr.}; 31d antis {"Nay" sayers}; 32d cyan {Shade of blue}; 36d rest {Observe the Sabbath}; 37d sun {The Sabbath, to Christians: Abbr.}; 38d ova {Eggs in a lab}; 39d neg. {Less than zero: Abbr.}; 41d magenta {Purplish tint}; 42d debug {Clear of defects, as software}; 44d boohoo {[Sob!]}; 46d mot {Bon ___ (clever remark)}; 47d tidier {Neater}; 51d echo {Bounce back, as sound}; 52d Aetna {Insurance provider since 1850}; 55d Phil {Grammy-winning Collins}; 56d Rome {All roads lead to this, they say}; 59d tap {Strike lightly}.



























