It's the spring of 1940 and change is on the horizon for everyone in Skeldale House. James and Helen wonder when the right time might be to start a family, Tristan's absence is felt by all, and Siegfried attempts to hold the growing household, and himself, together. Don't miss the Season 4 premiere on Sunday, January 7 at 9/8c. #allcreaturespbs #masterpiecepbs #allcreaturesgreatandsmall #nicholasralph #rachelshenton #samuelwest #annamadeley