I Love Lucy is an American television sitcom starring Lucille Ball, Desi Arnaz, Vivian Vance, and William Frawley. The black-and-white series originally ran from October 15, 1951 to May 6, 1957 on CBS. After the series ended in 1957, a modified version continued for three more seasons with 13 one-hour specials; it ran from 1957 to 1960. It was first known as The Lucille Ball-Desi Arnaz Show and later in reruns as The Lucy-Desi Comedy Hour.

The opening familiar to most viewers, featuring the credits superimposed over a "heart on satin" image, was created specifically for the 1959-67 CBS daytime network rebroadcasts, and subsequent syndication. As originally broadcast, the episodes opened with animated matchstick figures of Arnaz and Ball making reference to whoever the particular episode's sponsor was. These sequences were created by the animation team of William Hanna and Joseph Barbera, who declined screen credit because they were technically under exclusive contract to MGM at the time. The original sponsor was cigarette maker Philip Morris, so the program opened with a cartoon of Lucy and Ricky climbing down a pack of Philip Morris cigarettes. In the early episodes, Lucy and Ricky, as well as Ethel and Fred on occasion, were shown smoking Philip Morris cigarettes. Lucy even went so far as to parody Johnny Roventini's image as the Philip Morris "bellhop" in the May 5, 1952, episode, "Lucy Does a TV Commercial". Since the original sponsor references were no longer appropriate when the shows went into syndication, a new opening was needed, which resulted in the classic "heart on satin" opening. Other sponsors, whose products appeared during the original openings, were Procter & Gamble for Cheer and Lilt Home Permanent (1954-57), General Foods for Sanka (1955-57), and Ford Motor Company (1956-57). The later Lucille Ball-Desi Arnaz Show was sponsored by Ford Motor Company (1957-58) and Westinghouse Electric Corporation (1958-60), as part of the Westinghouse Desilu Playhouse. The original openings, with the sponsor names edited out, were revived on TV Land showings, with a TV Land logo superimposed to obscure the original sponsor's logo. However, this has led some people to believe that the restored introduction was created specifically for TV Land as an example of kitsch. The animated openings, along with the middle commercial introductory animations, are included, fully restored, in the DVDs. However, the openings are listed as special features within the disks with the "heart on satin" image opening the actual episodes. The complete original broadcast versions of Seasons 1 and 2, as seen in 1951-1953 with intros, closings, and all commercials, are included on their respective Ultimate Season Blu-ray editions.

Who were the sponsors of some of the episodes ?
cigarette maker Philip Morris,