Kendra gains Hawkgirl's signature weapon - the Nth metal mace, by melting down the bracelet belonging to her original self and pouring it over Carter's mace.
In the DC comics, Vandal Savage has two (known) daughters, one named Scandal Savage, the other named Kassidy Savage.
Rip Hunter (Arthur Darvill) says "at the eleventh hour" in this episode at about 12 minutes in. Darvill is most famous for portraying Rory Williams in Doctor Who, who first appeared in an episode called The Eleventh Hour.
Ray uses a temporal engine to reverse the Dwarf star alloy of his suit, allowing him to grow into a giant. This seems to have been taken from the Marvel Comics character Ant-Man, who can decrease and increase his size in a similar matter.