There is no such briefcase that can fold a mounted painting in half without causing any damage.
It makes no sense for Liz to take Rostova at her word when she claims to be Liz' mother. After everything that has happened previously, the logical thing to do would be to at least try to have her DNA tested for a familial match. She lived in the apartment across the floor for months and had no time to scrub it before she had to make her escape, so there is a chance to find a sample there or even in Liz' own place from all the times she has been babysitting Liz' daughter.
Elodie tells Aram "We made love in the Gemini capsule that John Glenn took into space." John Glenn flew in a Mercury capsule and on the space shuttle but never flew in the Gemini program.
When Mr. Radcliffe was on the floor and the caregiver was giving him chest compressions, she said he was in A-fib (Atrial fibrillation) and to call 911. Elodie called 911 and said he was having a heart attack. A-fib does not cause heart attacks. V-fib (Ventricular fibrillation) can and sometimes does but not in all cases. Additionally, chest compressions do nothing to resolve A-fib.