SERIES PREMIERE: AMC, in its quest to replicate its amazing string of early successes (Mad Men, Breaking Bad, The Walking Dead), has given up too early on one possible contender (Rubicon), been too patient with others (Hell on Wheels), let some go off the rails (The Killing), and approved some baffling series ideas in the first place – like Turn and, now, Halt and Catch Fire. Lee Pace, as a computer visionary in the early 1980s, plays a man who’s less prodigy than pirate, and the sin