Work responsibilities interfere with Don's domestic life; Peggy is given another opportunity; Betty...

The staff of Sterling Cooper pull an all-nighter on election night; Pete challenges Don.

Peggy deals with a difficult assignment; Don finds new opportunities in Roger's problems; Betty...

Roger tries to cheer up Don after he loses an account; Joan goes out with her roommate.

A rival ad agency uses Betty to try an lure Don away from Sterling Cooper; the agency tries to...

Don is tormented by his past; Peggy's success threatens her relationship; Salvatore gets close to a...

A rift forms between Don and Roger; Pete faces trouble at home.

A taboo office romance is revealed; Peggy proves to be more than a secretary.

Don deals with fallout after receiving an award; Pete makes a request; Peggy overhears a startling...

Pete's life becomes more complicated; Don is alienated.

Pete returns from his honeymoon; Don attends a party.

Don conceals his personal life; Peggy fends off advances of several men.

An ad-man struggles to stay ahead of the rapidly changing times.