Mad Men

Megan throws Don a surprise birthday party, the war between Pete Campbell and Roger Sterling intensifies, and new mother Joan begins to wonder if she still has a job when she's ready to come back.

Megan is hurt by Don's negative response to the surprise party, Lane finds a missing wallet in a cab, Joan makes an unexpected visit to the office, and Pete makes a play for a bigger office.

Peggy has new responsibility as Don and Harry indulge a client.

Don runs into someone from his past while Joan makes a decision.

Lane strikes up an interesting friendship as Pete entertains guests.

Peggy is rattled by a pitch while Don visits a potential client.

Don receives an award while Sally comes to the aid of a relative.

Peggy has to keep a secret while Pete covers for a friend.

Sally faces a challenge. Roger seeks new business.

Christmas wishes come true as everyone gets a gift; Harry helps out a friend.

Don's challenged by a pitch, Peggy contemplates a trip, and Joan entertains an idea.

Don follows a surprising lead while Sally goes out.

Opportunity is in the air for everyone while Pete meets a stranger on the train.