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TV Shows That Went Downhill After Season 1

7. 'Homeland' (2011-'20)
Another quintessential example of what we're talking about, Homeland is well-known for its impresssive debut season. Damian Lewis plays Nicholas Brody, a home-at-last war hero who also might be a walking sleeper cell. CIA agent Carrie Mathison (Claire Danes) suspects he's been turned and goes to great lengths to find out.