Talk:TPE Express/@comment-37832019-20190103051515/@comment-26828130-20190103141209

The tail wagon is a reward from the TPE Gem Collector achievement

If you have all the other wagons and the loco, it's likely that you've been playing long enough to have collected (more than) 20 gems from Mr. Bill's Gem Express, and thus must have the tail wagon. You probably have it behind another train, either in use, or somewhere in your depot

Search through your trains, and i bet you'll find it ;)