When word recently leaked that Lost had cast actress Bai Ling for a three-episode stint starting in February, even loyalists began to wonder whether Lost had finally lost it. It seems that Ling known for her work in Red Corner doesn't exactly command much respect. Wrote one poster at thetailsection.com: ''I kind of view [her] casting as a jump the shark situation. I hope I'm wrong.'' Well...you are! At least partially. Contrary to reports, the actress will appear in just one episode of the ABC drama flashbacks in which the secret of Jack's (Matthew Fox) made-in-Thailand tattoos will be revealed. Moreover, Lost thinks Bai Ling is awesome! ''She's off-the-charts sexy and a damn good actress,'' says exec producer Carlton Cuse. On the other hand, Losties seemed rather high (and then very, very hungry) about another bit of quirky casting: Cheech Marin, who is somewhat short, has been tapped to play father to Hurley, who is somewhat...not short. ''He's quite a good actor,'' says Cuse, who used to be Marin's boss on Nash Bridges. ''People only think of him as the doobie-smoking '70s dude. But he played Tyne Daly's love interest in Judging Amy. C'mon!'' While we're being wacky: How about asking Don Johnson to match stubbled cheeks and drawls with Sawyer? ''No,'' says Cuse. See? Those Lost guys do know what they're doing.