While I was watching the episodes of Busy Tonight where I liked the guest she had on, namely the first episode, Mindy Kaling was her actual guest but a handful of other late night hosts also showed up in a little pre-recorded segment where she was backstage on their shows or they sent her video messages, but they weren't the actual guests. How should we handle when people randomly show up but are not actually the guests of the night? This happens a good bit, like when Jimmy Fallon plays games with his guests they will sometimes they bring in other celebrities that might have been in the building or something to be partners with them, and times like when James Corden had a pre-recorded video with Chris Pratt where they went hiking but Chris Pratt wasn't his guest that episode, or when Niall Horan walked out pretending to be James' new water boy, plus all of his Carpool Karaoke segments. Sometimes an actor will just show up to show a trailer and leave, this has happened with Tom Holland and Chris Pratt before.
Should we keep the episode titles as the guests announced and have them as guest stars and then add any additional/surprise appearances as co-stars, or should they be listed as uncredited since technically they weren't announced as being guests for that night?