Mad Men is built up of a macrocosm of unforgettable scenes and witty one-liners and one of them has to be John Slattery's ...

Mad Men star John Slattery revealed that the show creator Matthew Weiner strictly prohibits any kind of improvisation on the ...

But the single bright spot occurs when Mad Men stars Jon Hamm and John Slattery make brief cameo ... so little on offer otherwise, this single scene struck pure gold.