Ztracená brána

{{Infobox television

| image = Ztracená brána cover.jpg

| caption =

| alt_name =

| genre = Crime
Mystery

| creator =

| developer =

| writer = Arnošt Vašíček
Jiří Strach

| director = Jiří Strach

| creative_director =

| starring = Ivan Trojan
Jiří Dvořák
Anna Geislerová

| opentheme =

| country = Czech Republic

| language = Czech

| num_seasons = 1

| num_episodes = 3

| list_episodes =

| executive_producer =

| producer =

| editor =

| location =

| cinematography =

| camera =

| runtime = 60 Minutes

| company =

| network = Czech Television

| first_aired = {{Start date|2012|09|09}}

| last_aired = {{End date|2012|09|23}}

| related = Ďáblova lest

}}

Lost Gate ({{langx|cs|Ztracená brána}}) is a Czech mystery series that premiered on Czech Television in September 2012. It is a sequel to the three-part series Ďáblova lest (2009). It was written by Arnošt Vašíček and directed by Jiří Strach.

The pair of police investigators Petr Sumara and Lenka Šímová investigate a case of a serial killer in the environment of the Prague lodge of freemasons with the help of religionist Michal Runa (Ivan Trojan).