Continuity mistake: Agent Wells is wearing high heel shoes when she gets kidnapped and wakes up on the ship in S1:E19. In S1:E20 she is wearing low heels when she tries to escape on the ship. In S1:E21 she is again wearing high heels when she drives away from the FBI building.
Designated Survivor (2016)
1 mistake in Season 1 generally - chronological order
Starring: Kiefer Sutherland, Natascha McElhone, Kal Penn, Adan Canto, Italia Ricci
Seth Wright: Mr. President.
Tom Kirkman: You don't need to get up every time I walk into a room. I'm not the Queen.
Seth Wright: No, sir. Virtually no resemblance.
Question: Why did Lyor, Mike, Brenda, Hookstaten, and Chuck randomly disappear from the series?
Answer: It's a recurring theme on the show. Characters come and go depending on the storyline. General Cochrane, Tyler Richmond, Abe Leonard, etc.