diff --git a/vms/hooks.py b/vms/hooks.py
index ea91d8c..860cdce 100644
--- a/vms/hooks.py
+++ b/vms/hooks.py
@@ -135,13 +135,11 @@
 # ---------------
 # Hook on document methods and events
 
-# doc_events = {
-# 	"*": {
-# 		"on_update": "method",
-# 		"on_cancel": "method",
-# 		"on_trash": "method"
-# 	}
-# }
+doc_events = {
+	"VMS Review Comment": {
+		"after_insert": "vms.notifications.send_comment_notification",
+	},
+}
 
 # Scheduled Tasks
 # ---------------
diff --git a/vms/notifications.py b/vms/notifications.py
new file mode 100644
index 0000000..bbe3428
--- /dev/null
+++ b/vms/notifications.py
@@ -0,0 +1,86 @@
+import frappe
+from frappe import _
+
+
+def send_comment_notification(doc, method):
+	"""Send email notification when a new review comment is added.
+
+	- Notify the asset uploader when someone else comments on their upload.
+	- Notify the parent comment author when someone replies to their comment.
+	"""
+	frappe.enqueue(
+		_send_comment_email,
+		queue="short",
+		comment_name=doc.name,
+		now=frappe.flags.in_test,
+	)
+
+
+def _send_comment_email(comment_name):
+	comment = frappe.get_doc("VMS Review Comment", comment_name)
+	asset = frappe.get_doc("VMS Asset", comment.asset)
+
+	commenter_name = _get_commenter_display_name(comment)
+	asset_url = _get_review_url(asset)
+
+	recipients = set()
+
+	# 1. Notify the uploader (if someone else commented)
+	if asset.uploaded_by and asset.uploaded_by != comment.commented_by:
+		recipients.add(asset.uploaded_by)
+
+	# 2. Notify parent comment author (if this is a reply)
+	if comment.parent_comment:
+		parent = frappe.get_doc("VMS Review Comment", comment.parent_comment)
+		if parent.commented_by and parent.commented_by != comment.commented_by:
+			recipients.add(parent.commented_by)
+
+	if not recipients:
+		return
+
+	subject = _("{0} commented on {1}").format(commenter_name, asset.file_name)
+	timestamp_str = ""
+	if comment.video_timestamp is not None and comment.video_timestamp > 0:
+		timestamp_str = f" at {_format_timestamp(comment.video_timestamp)}"
+
+	is_reply = bool(comment.parent_comment)
+	action_text = _("replied to a comment") if is_reply else _("left a comment")
+
+	message = f"""
+<p><strong>{commenter_name}</strong> {action_text} on <strong>{asset.file_name}</strong>{timestamp_str}:</p>
+<blockquote style="border-left: 3px solid #ccc; padding-left: 12px; margin: 12px 0; color: #555;">
+{frappe.utils.escape_html(comment.comment_text)}
+</blockquote>
+<p><a href="{asset_url}">View in Review</a></p>
+"""
+
+	try:
+		frappe.sendmail(
+			recipients=list(recipients),
+			subject=subject,
+			message=message,
+			reference_doctype="VMS Review Comment",
+			reference_name=comment.name,
+			now=True,
+		)
+	except Exception:
+		frappe.log_error(title=_("VMS: Failed to send comment notification"))
+
+
+def _get_commenter_display_name(comment):
+	if comment.guest_name:
+		return f"{comment.guest_name} (Guest)"
+	if comment.commented_by:
+		return frappe.db.get_value("User", comment.commented_by, "full_name") or comment.commented_by
+	return _("Someone")
+
+
+def _get_review_url(asset):
+	site_url = frappe.utils.get_url()
+	return f"{site_url}/vms/review/{asset.name}"
+
+
+def _format_timestamp(seconds):
+	mins = int(seconds) // 60
+	secs = int(seconds) % 60
+	return f"{mins}:{secs:02d}"