What We Do In The Shadows Season 4 ended with bringing back adult Colin Robinson, the Energy vampire of the series. He was and remains a pivotal figure on the show and a fan favorite character. While his arc was a little odd in Season 4, his Season 5 story seems to starting off in a much better place. Colin has a new job in the service industry, allowing him to take the world by storm, boring people with his anecdotes and sucking the very life out of them.
Source:https://www.cbr.com/what-we-do-in-the-shadows-colin-robinson-waiter/