"The Escape", the last mission of Sequence 9, which is one concentrated Funny Moment. It begins with Elise running in away from Jacobins for reasons she refuses to explain, and escalates very quickly to stealing a prototype hot-air balloon in the middle of a thunderstorm with Arno desperately trying to catch up with her.
Shaun's database snarking is back, now in the form of footnotes. From the entry on Jacques de Molay:
Jacques de Molay was born between 1245 and 1250.* * Now that's a long labour.