Michael Shanks, who plays Carter Hall (Hawkman) is no stranger to playing the role of an archaeologist. He portrayed Daniel Jackson in Stargate SG-1 (1997) throughout most of its 10 year run, as well as made guest appearances as that Character in the two spin-off series, Atlantis and Universe.
This is not the Cat Grant from "Crossfire" since she says, "No relation to the one on T.V., I get that a lot." Then later in the episode Clark is looking through the personnel records telling Tess her real name is, "Mary Louise Schroger."
This episode is the last episode to show Clark wearing his blue jacket and red t-shirt which is reminiscent to his Red Jacket and Blue T-Shirt attire.
The note Lois gives Carter, that she found in a book, reads: To Carter- My once and ever prince. With love, Shayera -Shanghai 1824
When Clark and Tess are talking about Deadshot working for Checkmate. Curiously, Deadshot was one of the first recruits to Amanda Wallers Task Force X. Especially, since he is the only recurring character beside Harley Quinn to be seen in all the animated movies and TV cartoons, as well as in the new Suicide Squad played by Will Smith.