Jay Leno

"Leno: 2nd 'Tonight exit' is quits for late-night"
- Yahoo TV
"Instead, he relies on numbers to tell the
story. Leno's tenure is second only to
Johnny Carson's 30 years; "Tonight" was
No. 1 among viewers when he took it over
and will be when he hands it off to Jimmy
Fallon; he'll have taped more shows than
any predecessor, Carson included, with the
final and 4,610th one...."
http://tv.yahoo.com/news/leno-2nd-39-tonight-exit-39-quits-night-173219730.html