First Thanksgiving episode of The Flash.
This is Liam McIntyre's first physical appearance in the series as Mark Mardon/Weather Wizard since Running to Stand Still (2015).
Joss' comics counterpart Joshua "Josh" Jackam was the son of Mark Mardon and Julie Jackam. He had the same powers as his father. In the comics, Weather Witch (which is Joss' alias in the show) is an ex-prostitute who worked for Penguin and with the New Rogues, a group of criminals who used the original Rogues' gimmicks, but were killed by the Rogues.
This is the first episode to not feature Hartley Sawyer and Danielle Nicolet after being promoted to series regulars. Ralph Dibny is also not featured in any kind of way as he does not show up or get mentioned, According to Danielle Panabaker on Twitter, Ralph was visiting his mother for Thanksgiving. To be clear, Ralph Dibny is played by Sawyer.
When she and Iris return from getting mani-pedis, Nora calls Instagram "old-fashioned," suggesting that that particular social media platform has become obsolete by 2049.