"Happy Anniversary" was not only the second season opener, it was the show's first color episode, signaling a few changes in Major Nelson's décor, and the debut of Michael Ansara, Barbara Eden's then-husband, in his first of three appearances. It's been a full calendar year since he found his beautiful Jeannie in a bottle, the only anniversary she has and her master forgot, getting ready to go into orbit in a few hours. A successful takeoff abruptly ends in identical fashion, a furious Tony trapped on the same island where he found his genie, finding a different colored bottle out of which emerges the Blue Djinn (Ansara). He has been imprisoned within his bottle for 1500 years, and has vowed to take the life of whoever frees him, though Tony prefers to die of old age. He manages to find Jeannie's bottle, but learns that the Blue Djinn is the most powerful genie of all, the one who imprisoned her inside her bottle 2000 years before. With her helpless before his evil magic, Jeannie agrees to go with him willingly, before blinking her master and herself to safety in Cocoa Beach. The Blue Djinn follows, but is put off by the magic on the TV screen, then talk of the Nelson treasure lures him into a vacuum cleaner, dropped off in the middle of the Pacific Ocean. Before Tony gets into trouble by being seen at NASA by General Peterson, Jeannie blinks him back into orbit on his capsule. We see the last of the often mentioned Blue Djinn emerging from the ocean to interrupt Jeannie's celebration, the character never making a second appearance, though Michael Ansara would return on two occasions, in "The Battle of Waikiki" and "My Sister, the Home Wrecker" (this was the third, brief, appearance from IRONSIDE's Don Mitchell).