In the case of Robert Picardo, we were children when he was playing the Doctor on Voyager. So, you think to yourself, if we're going to get this actor to say yes, to come and give up years of their lives, put back on a uniform, we have to give them something good to sink their teeth into.
Initially, when Billie Piper appeared following Ncuti Gatwa's regeneration, fans were skeptical over her status as the new Doctor and speculated that she was actually Rose Tyler. Piper previously appeared in the 50th anniversary special, "The Day of the Doctor," but not at Rose. Instead, she played a much more ephemeral character known as "The Moment," also called "Bad Wolf."
When someone mentions 1970s science fiction about a band of rebels fighting an evil, totalitarian space regime, your mind almost certainly goes to the original 1977 Star Wars.Failing that, you might think about the 1978 Battlestar Galactica, or even the TV and film versions of Logan's Run. But the oddest and most under-the-radar 1970s sci-fi rebellion show was Created by Terry Nation (the man who gave us the Daleks), Blake's 7 was ahead of its time when it debuted in 1978.