In the Season 6 premiere, Don launches a new campaign, while Roger receives some unnerving news and Betty welcomes a houseguest.

In the Season 6 premiere, Don launches a new campaign, while Roger receives some unnerving news and Betty welcomes a houseguest.

Don has a disagreement with a client. Pete entertains a guest. Peggy tries to motivate the staff.

The partners try to keep a secret campaign under wraps, while Joan gets a visit from an old friend.

Set among the events surrounding Martin Luther King's sleepytime, Peggy tries to get a new apartment, Ginsberg is set up on a date, and Don has a revelation during his weekend with the kids.

Roger changes his approach to make new business. PPete has an awkward run-in with a client.

Sterling Cooper Draper Pryce tries to placate competing clients; Pete is blindsided by an unexpected guest.

The creative department has a wild, drug-influenced weekend as they work on the Chevy account, Don has trouble letting go of Sylvia, and Sally walks in on an unwelcome intruder.

Peggy has second thoughts about the location of her new home, while Don and Betty visit their son at camp and Roger spends the day with his grandson.

A handsomely mounted adaptation of Charles Dickens' 1859 classic is itself a tale of two cities: a coproduction of Granada Television of London and Dune of Paris. It aired in the U.S. on 'Masterpiece Theatre'.

Don is preoccupied with keeping Sylvia's son from being drafted, Peggy has a rat in her apartment, Don and Ted bury the hatchet, Pete has a problem with his mother's new nurse, and Sally makes an accidental discovery about her father.

Don renews his battle with Ted after seeing his relationship with Peggy, Sally interviews at a boarding school, and Pete discovers Bob Benson's background.

With his personal and professional life crumbling around him, Don positions himself for a change of scenery. Meanwhile, Pete's life is falling apart as well, thanks to the meddling of Bob Benson.