In robotics terms, a waldo is a device that allows a machine or computer image to be controlled by a hand operated device, such as the one that is used to control Waldo the Bear. The term comes from the novella of the same name by Robert A. Heinlein in which the lead character builds advanced robot arms for himself.
The list of Waldo sketch ideas written down by Sarah are: 'Re-Enact Twitter?', 'Oscars/Red Carpet', 'Towie Spoof', 'Sherlock Jr?' and finally, 'Vote Waldo'.
The name 'The Waldo Moment' is a reference to the term 'Portillo Moment', which means a sudden and significant change in politics, named after Michael Portillo who famously lost his safe seat of Enfield Southgate in the 1997 General UK Election.
The users visible in Jack's Twitter feed are in descending order Jon Snow (with the tweet: 'Tories confirm Liam Monroe for Stent & Hersham'), Greg Shaw, Erica McEwan, and Foundation Agency.
Jason Flemyng also plays a villain in Pennyworth (2019), a TV show that serves as an origin story for Batman's butler, Alfred Pennyworth.