Here's a screencap of the picture of Ford and Arnold as seen by Bernard:
Here's a screencap of the host portraying Ford's father:
I just saw a piece on Deadspin (yes I know they suck) and noticed that Ford now dresses similarly to Arnold's style, and that Arnold's sweater vest in the picture looks like the one that android Dad is wearing. Here's what Deadspin said:
This week’s theory that’s sending the internet into a tailspin is that the actor playing Ford’s robot father looks a lot like Arnold in the photo Ford showed Bernard in episode three. We all assumed the younger one is Ford, because otherwise he’s aged really well. But if this is accurate, was Arnold Ford’s dad? That definitely would explain why Arnold’s version of his family was so idealized. And also, possibly, who took Elsie. Plus, it would make sense, narratively, for this whole thing to have started as a family business. There’s also the possibility that Bernard isn’t seeing the photo properly because he is a host. If he’s the Arnold copy, the photo wouldn’t show him as himself. We know that photos that disrupt the hosts’ belief in their world don’t appear weird to them. On the one hand, it’s seeming likely that there’s something off about Arnold and Ford’s dad. On the other hand, what the ****?