God Bless the Child
Passages and quotes - from Midnight Rose
Two cents - from Midnight Rose
B&B companion - by Peter Formaini (external link, subject to be broken)
Epi-log journal - by Nina Johnson (external link, subject to be broken)
Episode guide on CABB - by Tunnelmom (external link, subject to be broken)
Lenas name is probably short for Magdalena, hinting at the prostitute who followed Jesus.
The diner Cathy meets Lena at is called Agamenon's. (The correct spelling would be Agamemnon)
A waitress is credited in the closing titles, but does not appear in the episode - she was in the diner scene, in an earlier version of the script.
The episode has an overall Christmas flavor, recalling Vincent found as a newborn "wrapped in rags". It was filmed before Dead of Winter, but broadcasted after it (DoW on Dec 9, GBTC on Dec 16), to move it closer to Christmas.
Several Christmas music/songs are spread along the episode:
It Came Upon A Midnight Clear - sung by the tunnel children directed by Father
The First Noel
Vincent and Father argue about names for Lena's child,
mentioning four female names from Shakespeare plays:
Rosalind - As You Like it
Imogen - Cymbeline
Juliet - Romeo and Juliet
Maria - Twelfth Night and Loves Labour Lost
Vincent lends Lena a book by Lord Byron (1788-1824): she refers to it mentioning that she's liking "especially the letters". Byron was a superb letter-writer, many editions exist of his letters and journals. In an earlier version of the script Vincent quotes a poem from Byron's Childe Harold's Pilgrimage
The identical clothing suggests that one of the prostitutes on the street as Cathy is searching for Lena is Lucy from No Way Down.
Maurice, the "information broker", is also seen in The Hollow Men
"God Bless the Child" is also the title of a song written by Billie Holiday and Arthur Herzog Jr. in 1939, as well as of a 1988 movie dedicated to "13 million children living in poverty in the USA today" (starring, among others, Dorian Harewood, Jason Walker from Terrible Savior)