Ezra Moore was a hunter in the 1940s who assisted Eliot Ness with lore, research and fine suits.
Eliot takes Dean to Ezra, after questioning him, in order to get a change of clothes and not look like a "bindlestiff." Afterwards, she begins searching for a way for the hunters to kill Chronos, the god of time who's behind all of the suspicious murders. She discovers a thousand-year-old stake dipped in blood that's capable of doing the job and gives it to Dean. However, Dean pointed out that killing Chronos would forever strand him in 1944. Ezra assured him that her era has plenty of ways of passing the time and gave him a kiss for good luck.