I admit it's a difficult one, basing an actress on the Sarah Connor from the beginning of T1, to the hardened fitter Sarah Connor who swore to overcome her treatment in Pescadero and build herself up for the unknown horrors that might ensue.
I remember seeing DCs Legends of Tomorrow and how Caity Lotz might fit the role.
Then there's Ingrid Bolso Berdal - Armistice from Westworld.
I guess the list goes on but sadly, and I hate to think it happened, Emilia Clarke was not quite right for the role.
Mind you, I'm sure I'm not the first to say it, the direction and summing up which action sequence was believable and which ones were crap, was abysmal.