KPTS-DT

A visit to Juilliard Pre-College; Singapore's Chloe Chua.

Stephen Hawking prompts three people to think like philosophers as well as scientists as they assess why humans exist.

Stephen Hawking leads three people on a journey of discovery featuring racing cars, ice skaters, balloons and running tracks.

Playing the fife and drum; Daniel Tiger learns about friends and sadness.

Arthur helps D.W. prepare for a bikeathon; Francine whips Arthur's baseball team into shape.

Decoding the secret language of dolphins.

The Hunters head to a nearby mountain to learn about snow.

Cora's mother sweeps into Downton for Matthew and Mary's wedding, but with the couple's relationship under strain they might not make it to the altar.

Edith is enthusiastic about her wedding and hopes to convince her family that Strallan's age does not matter. With Downton's finances dire because of Robert's actions, Mary takes matters into her hands -- but the personal price may be high.

Branson's political views land him in hot water, and Sybil's loyalty is tested to the limit. Meanwhile, Ethel is torn between head and heart as she makes a difficult decision about her son's future. Elsewhere, Anna is dispirited at Bates' silence.

An exciting offer for Edith divides opinion, Isobel throws Ethel a lifeline, and new maid Ivy is attracting attention below stairs. Meanwhile, Anna's perseverance finally pays off, and Matthew's concerns about the estate grow.

Branson has a strong supporter in his corner after making a tough decision, and Robert and Cora's relationship is under greater pressure.

Change affects many at Downton Abbey; the yearly cricket match settles old scores.

The family travels to Duneagle Castle, while the servants spend Christmas at Downton.

Following Matthew's untimely death, Mary struggles to come to terms with her loss; Edith experiments with modernism.

An extravagant house party at the abbey gives the Crawleys a chance to reconnect with old friends, but some guests prove more welcome than others, and along with the celebrations come deceit and heartache.

Amid the fallout from the eventful house party, Mary faces a pressing question about her future, while Carson reveals surprisingly intimate details of his former life.