Who came back to haunt the team?
On The Rookie Season 4 Episode 5, Nolan was surprised by the sudden arrival.
The team also had to contend with a new street drug in LA that turned people into “zombies.”
Zombie apocalypse alert!
Meanwhile, Chen set out to help her neighbor when it emerged that she was being scammed.
How did it all play out?
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Paul Dailly is the Associate Editor for TV Fanatic. Follow him on Twitter.