Parade's End on HBO

Season 1, Episode 5
At the front, Christopher takes over from a commanding officer who suffers from shell shock and a drinking problem. After General Campion arrives to take over his command, Christopher convalesces and is sent home, where Sylvia--now ensconced at Groby--makes a last-ditch attempt to keep her husband from building a future with Valentine.

Season 1, Episode 4
In Rouen, Christopher prepares recruits for battle. Bored in London, Sylvia decides to visit her husband in France, oblivious to the consequences. Christopher's leniency towards a soldier accused of desertion angers the chief of military police. Following a confrontation outside Sylvia's hotel room, Christopher is ordered to leave Campion's training unit--for the front.

Season 1, Episode 3
As Christopher recovers from shell shock in France, a round of vicious rumors leads to a shocking tragedy at Groby, his family home. Sylvia finds a new admirer, Brownlie; Edith and Macmaster plan a new life together; Valentine, whose family has been stigmatized, secures a London teaching job, but falls out of favor with the social-climbing Edith.

Season 1, Episode 2
After a stint in France with her fawning admirer, Perowne, Sylvia reunites with Christopher. Under his terms of reconciliation, Christopher insists they move into a flat opposite Macmaster. After war is declared, Christopher is ordered to massage military numbers; outraged at being asked to lie, he quits his job and enlists in the army, infuriating his wife.