diff --git a/Sources/RemindersLibrary/Reminders.swift b/Sources/RemindersLibrary/Reminders.swift
index 2640811..fb04a20 100644
--- a/Sources/RemindersLibrary/Reminders.swift
+++ b/Sources/RemindersLibrary/Reminders.swift
@@ -288,7 +288,17 @@ public final class Reminders {
         let calendar = self.calendar(withName: name)
         let semaphore = DispatchSemaphore(value: 0)
 
-        self.reminders(on: [calendar], displayOptions: .incomplete) { reminders in
+        // Numeric indexes are only meaningful against the same display set that
+        // `show` uses by default (incomplete-only), so keep that scope when the
+        // caller passes a plain integer index — otherwise a numeric index would
+        // resolve against a differently-ordered/sized array than the one the
+        // user actually saw. External identifiers are stable regardless of
+        // completion state, so widen the fetch to `.all` in that case, so a
+        // reminder already marked complete can still be found and deleted by
+        // its id instead of failing with "No reminder at index ...".
+        let displayOptions: DisplayOptions = Int(index) == nil ? .all : .incomplete
+
+        self.reminders(on: [calendar], displayOptions: displayOptions) { reminders in
             guard let reminder = self.getReminder(from: reminders, at: index) else {
                 print("No reminder at index \(index) on \(name)")
                 exit(1)