- Acting for Two: Michael Rooker not only reprises his role of Merle, but he also plays the Jonathan Kent Expy.
- The Other Darrin:
- Daniel Radcliffe notably steps in to play Gareth, replacing Andrew J. West.
- Jeffrey DeMunn (Dale), Austin Amelio (Dwight), Ann Mahoney (Olivia), Laurie Holden (Andrea), and Christian Serratos (Rosita) are among the many actors who did not reprise their roles from the show (most of their characters only had one line anyway).
- Role Reprise: Andrew Lincoln (Rick), Norman Reedus (Daryl), Jon Bernthal (Shane), Sarah Wayne Callies (Lori), Chandler Riggs (Carl), Danai Gurira (Michonne), Melissa McBride (Carol), Steven Yeun (Glenn), Lauren Cohan (Maggie), Josh McDermitt (Eugene), Jeffrey Dean Morgan (Negan), Michael Rooker (Merle), Lennie James (Morgan), and Scott Wilson (Hershel) all reprise their roles from the series for this special.
- What Could Have Been: Andrew J. West was open to reprising his role of Gareth, but was ultimately passed over since he cannot sing, and Gareth spends the entirety of his role in the special singing.
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