Sam identifies the plant in the wreath as Meadowsweet – a herb used in pagan rites to summon gods to a human sacrifice. 

In 'A Very Supernaturl Christmas' what were the wreaths made of that tipped Sam off that something wasn't quite right in Ypsilanti?

Upon finding the first body Sam speculates that they may be dealing with an evil Santa, as there are many legends, such as that of Krampus, about a being who punishes the wicked at Christmas, after they found a victim was pulled up the chimney.

When investigating the initial victim in 'A Very Supernatural Christmas' what creature do the boys think they're initially hunting?

Sam wants to give Dean the present meant for his father. Dean at first refuses, but then accepts. It is the amulet that he wears until this day. 

In the flash back scenes during 'A Very Supernatural Christmas' what item does Sam give dean that he still wears in the present day story line?

The present Dean returns from buying beer to find that Sam has decorated the motel room with a tree hung with air fresheners, and made eggnog.

What do Sam and Dean decorate their Christmas tree with when they decide to have their Christmas afterall in 'A Very Supernatural Christmas'?

The boys exchange presents, all bought from the local gas station – Dean gives Sam porn magazines and shaving cream, and Sam gives Dean oil for the car and a candy bar. Sam starts to say something, but is overcome with the emotion of the moment, and instead suggests they watch a football game on TV.  

What does Sam give Dean as his gift at the end of 'A Very Supernatural Christmas'?

In the bunker, Sam is going through the lore when he hears a clanking noise. The clanking noise continues, and Dean comes in and says that he hears the clanking as well. He's wearing an apron, and says that he keeps trying to make burgers, but the pilot light and the hot water keeps going out.

In the episode, 'Last Holiday' what keeps going wrong that causes Dean to reboot the bunker?

When Dean hit the standby button, he "reactivated" Butters. She wants to make them a home cooked meal, celebrate a holiday, and wash their clothes.

What is the name of the woman who had put herself on standby mode and was reactivated when Dean reset the bunker systems?

Butters introduces herself and says that she's a wood nymph. Butters explains that she lives in the bunker and was a helper to the Men of Letters, taking care of the cleaning and cooking. 

What kind of creature is Mrs. Butters in, 'Last Holiday'?

What color was the nightshirt Mrs. Butters gave Dean as a Christmas Gift?

In the episode 'The Devil in the Details', Rowena has a recurring dream about Christmas morning where Crowley is in a onsie. Who is she really dreaming of as Santa Claus?

Test your knowledge of Sam and Dean's Christmas antics in a holiday themed Supernatural Quiz.