Tidelands (2018)

S3E10 Ghost Town

Vilgax makes a deal with Ghostfreak, offering to free him from captivity in exchange for the secrets of the Omnitrix. However, Ghostfreak double-crosses him by transforming his own allies into minions. Furious, Vilgax arrives on Earth and seeks the assistance of Ben, Gwen, and Kevin to deal with the rogue Ghostfreak and reclaim control over the situation.