|image= [[Image:Alastair demon.jpg|300px]]<br>[[Image:Alistair in 4.15 Death Takes A Holiday.jpg|300px]]
|name= Alastair
|actor= [http://www.imdb.com/name/nm0001679/ Mark Rolston] ([[4.09 I Know What You Did Last Summer|4.09]], [[4.10 Heaven And Hell|4.10]])<br> [http://www.imdb.com/name/nm0382216/ Christopher Heyerdahl] ([[4.15 Death Takes A Holiday|4.15]], [[4.16 On The Head Of A Pin|4.16]], [[4.21 When The Levee Breaks|4.21]])
===[[4.15 Death Takes A Holiday]]===
[[Image:Alistair in 4.15 Death Takes A Holiday.jpg|300px|thumb|Alastair in his new meatsuit.]]
Alastair is attempting to break one of [[The 66 Seals]] by killing two reapers under a solstice moon. He confronts Dean and Sam in a cemetery, and injures Dean, but Sam is resistant to his powers and fights back. When the boys become non-corporeal, and therefore subject to ghostly weaknesses, they track Alastair down at a funeral home and he traps them with an iron chain. He kills one reaper, but the boys rescue [[Tessa]]. Later as he confronts Dean, Alastair is captured by the angels, led by Castiel.