Christmas Truce of 1914 : British and French Troops laid down their arms, climbed out of the trenches and played soccer with their German counterparts; It involved over 100,000 men all over the Western Front (French-German border) .
Cafe Grumpy, the place where Police Commissioner Reagan and his subordinates had a sit-down, is a block away from Broadway Stages, where Blue Bloods is filmed and is the preferred coffee vendor of Tom Selleck.
DIF is short for Death In Family.
Josh Asher, man who played "Tuna", is Jenny McCarthy's ex-husband and father of her child. Jenny McCarthy is now married to Donnie Wahlberg.
Anthony tells Erin that his father rose from an apprentice to owning his own contracting firm. In a previous episode, he had told her that his father was a bookie, Tony the Bat. Guess what he used to make collections.