This is the first time that a character recognizes David Banner and confirms that he is indeed alive. It is also in turn one of the rare occasions after the pilot where Dr. Banner is able to use his true identity to a character and be called such by them.
At one point, the character portrayed by Whit Bissel says "I'm no H.G. Wells. I have no Time Machine". Whit Bissel appeared in the 1960 film adaptation of H.G. Wells' "The Time Machine".
It is unclear why Rick calls David 'white eyes' as soon as he speaks to him.