Double Vision?

Bob is very fond of science fiction, whether books,films or TV programmes. Me, not so much. But years ago, he pointed out to me two actors in this TV genre who look so similar, they are frequently confused. So much so, that they themselves occasionally appear together...[they are both Brits] 

James Callis played Dr Gaius Baltar in more than 70 episodes of Battlestar Galactica [as well as playing Tom, a good friend to Bridget Jones in 4 films] but he looks awfully like Alexander Siddig who played Dr Julian Bashir in over 170 episodes of Star Trek

They do look very like each other imho

We both like crime dramas. Currently enjoying Grantchester, Patience and Silent Witness, in the first, one of the main characters is Leonard [the former curate] played by Al Weaver. We were watching Patience, and I said there's Leonard! He sounded like him too. But when I checked out the cast list, this minor character was actually a different guy called Rasmus Hardiker. And to add to the Co fusion, RH also had a bit part in Silent Witness too. Here's RH and AW.

What do you think?

Can you think of any other famous lookalikes?

PS tomorrow's post will not have a sight- related title!