[2] He played the roles of incompetent carpenter Alf Monroe in the CBS sitcom Green Acres and Uncle Charlie Halper, proprietor of the Copa Club, in The Danny Thomas Show and its spin-offs.

Among his most famous films were Lost Continent with Cesar Romero, The Steel Helmet with Gene Evans and Robert Hutton, The Lemon Drop Kid with Bob Hope, and Lady Sings The Blues with Diana Ross and Billy Dee Williams.

[4] Sid met screenwriter Aubrey Wisberg, who arranged for him to have a part in his Treasure of Monte Cristo for Robert Lippert.

The studio churned out low-budget films, most of them made in less than a week, and Melton was the comic relief in dozens of them, including Mask of the Dragon and Lost Continent.

He appeared in three Lippert Pictures, Hi-Jacked,Lost Continent and Radar Secret Service, later featured on Mystery Science Theater 3000, whose hosts gave Melton the nickname "Monkey Boy" due to his comedy relief antics.

In the late 1950s, he played several small roles in the popular Desilu show The Lucy-Desi Comedy Hour as a construction worker who comes into the room through the window to ask for Milton Berle's autograph for his children.

Sid appeared in S6 E9 of The Andy Griffith Show (The Hollywood Party) as a publicity agent for Ruta Lee’s character Darlene Mason.