diff --git a/seismo_lab.py b/seismo_lab.py
index 1986127..5cad795 100644
--- a/seismo_lab.py
+++ b/seismo_lab.py
@@ -54,6 +54,7 @@ from s3_analyzer import (  # noqa: E402
     write_claude_export,
 )
 from frame_db import FrameDB  # noqa: E402
+from minimateplus.binary_annotate import annotate_blastware_binary  # noqa: E402
 
 # ── colour palette ────────────────────────────────────────────────────────────
 BG       = "#1e1e1e"
@@ -2675,6 +2676,95 @@ class DownloadPanel(tk.Frame):
         self._on_capture_ready(bw_path, s3_path, label)
 
 
+# ─────────────────────────────────────────────────────────────────────────────
+# Inspector panel — annotated hex view of a Series-3 binary
+# ─────────────────────────────────────────────────────────────────────────────
+
+class InspectorPanel(tk.Frame):
+    """Load any Series-3 waveform binary and read it as an annotated hex dump.
+
+    Regions the decoder understands (header, STRT, per-channel sample records,
+    footer) are labelled and colour-coded; everything the decoder cannot account
+    for is flagged UNKNOWN, so undecoded bytes stand out for hand-inspection.
+    """
+
+    _KIND_COLOR = {
+        "header":  ACCENT,
+        "strt":    YELLOW,
+        "sample":  COL_S3,
+        "footer":  FG_DIM,
+        "unknown": RED,
+    }
+
+    def __init__(self, parent: tk.Widget, initialdir=None, **kw) -> None:
+        super().__init__(parent, bg=BG, **kw)
+        self._path = None
+        self._initialdir = initialdir
+        self._build()
+
+    def _build(self) -> None:
+        bar = tk.Frame(self, bg=BG2)
+        bar.pack(side=tk.TOP, fill=tk.X)
+        tk.Button(bar, text="Open binary…", command=self._open, bg=BG3, fg=FG,
+                  relief=tk.FLAT, font=MONO, activebackground=ACCENT).pack(side=tk.LEFT, padx=6, pady=6)
+        self._path_var = tk.StringVar(value="(no file loaded)")
+        tk.Label(bar, textvariable=self._path_var, bg=BG2, fg=FG_DIM, font=MONO).pack(side=tk.LEFT, padx=6)
+        self._summary_var = tk.StringVar(value="")
+        tk.Label(bar, textvariable=self._summary_var, bg=BG2, fg=FG, font=MONO).pack(side=tk.RIGHT, padx=10)
+
+        legend = tk.Frame(self, bg=BG2)
+        legend.pack(side=tk.TOP, fill=tk.X)
+        tk.Label(legend, text="legend:", bg=BG2, fg=FG_DIM, font=MONO).pack(side=tk.LEFT, padx=(8, 2))
+        for kind, color in self._KIND_COLOR.items():
+            tk.Label(legend, text=f"■ {kind}", bg=BG2, fg=color, font=MONO).pack(side=tk.LEFT, padx=5, pady=2)
+
+        self._text = scrolledtext.ScrolledText(
+            self, bg=BG, fg=FG, insertbackground=FG, font=MONO, wrap=tk.NONE, borderwidth=0)
+        self._text.pack(side=tk.TOP, fill=tk.BOTH, expand=True)
+        for kind, color in self._KIND_COLOR.items():
+            self._text.tag_configure(kind, foreground=color)
+        self._text.tag_configure("label", foreground="#ffffff", font=("Consolas", 9, "bold"))
+        self._text.tag_configure("dim", foreground=FG_DIM)
+        self._text.configure(state=tk.DISABLED)
+
+    def _open(self) -> None:
+        p = filedialog.askopenfilename(title="Open a Series-3 binary", initialdir=self._initialdir)
+        if p:
+            self.load(Path(p))
+
+    def load(self, path: Path) -> None:
+        try:
+            raw = path.read_bytes()
+            spans = annotate_blastware_binary(raw)
+        except Exception as e:  # noqa: BLE001 — surface any read/annotate failure to the user
+            messagebox.showerror("Inspector", f"Failed to read/annotate:\n{path}\n\n{e}")
+            return
+        self._path = path
+        self._path_var.set(str(path))
+        self._render(raw, spans)
+
+    def _render(self, raw: bytes, spans) -> None:
+        t = self._text
+        t.configure(state=tk.NORMAL)
+        t.delete("1.0", tk.END)
+        unknown = sum(s.end - s.start for s in spans if s.kind == "unknown")
+        pct = 100 * unknown / max(1, len(raw))
+        self._summary_var.set(f"{len(raw)} B · {len(spans)} regions · {pct:.1f}% unknown")
+        for s in spans:
+            t.insert(tk.END, f"\n── {s.label}  [0x{s.start:04x}:0x{s.end:04x}]  {s.end - s.start} B ──\n", ("label",))
+            self._insert_hex(t, raw, s.start, s.end, s.kind)
+        t.configure(state=tk.DISABLED)
+
+    def _insert_hex(self, t: tk.Text, raw: bytes, start: int, end: int, kind: str) -> None:
+        for off in range(start, end, 16):
+            row = raw[off:min(off + 16, end)]
+            hx = " ".join(f"{b:02x}" for b in row).ljust(16 * 3 - 1)
+            txt = "".join(chr(b) if 32 <= b < 127 else "." for b in row)
+            t.insert(tk.END, f"  0x{off:04x}  ", ("dim",))
+            t.insert(tk.END, hx, (kind,))
+            t.insert(tk.END, f"  {txt}\n", ("dim",))
+
+
 # ─────────────────────────────────────────────────────────────────────────────
 # Main application window
 # ─────────────────────────────────────────────────────────────────────────────
@@ -2730,6 +2820,9 @@ class SeismoLab(tk.Tk):
         )
         nb.add(self._download_panel, text="  Download  ")
 
+        self._inspector_panel = InspectorPanel(nb)
+        nb.add(self._inspector_panel, text="  Inspector  ")
+
         self._nb = nb
         self.protocol("WM_DELETE_WINDOW", self._on_close)