When Elena Apostol is found hanged in her dressing room, it is assumed that she committed suicide, however there seems to be nothing in the room that she could have been standing on while placing the noose around her neck.
The New Zealand passport given to Jonathan is inaccurate: New Zealand passports now have a black cover with a prominent silver fern, while older passports were dark blue with the coat of arms. The country coat of arms on the front cover is incorrect, the personal details page does not have the descriptors in Maori, and the passport contains a number of visas, including an Australian one. However, New Zealanders do not need a visa when traveling to Australia.
When Pine obtains the key to look in The Citadel to make use of the alarm test at 11:00, the alarm panel displays 11:03:38 for a moment before switching to a count from 10:59:53.
The Spanish lawyer's daughter's tragic death is suicide by hanging, but there is no visible means of her reaching the height necessary to suspend herself in the manner depicted. It would not have been physically possible for her to get into that position on her own.
When Jonathan gets the fake passport, an autograph should already be in there. Yet he is asked to create an autograph when signing some papers.