Appears to be broadcast out of order. In S5, several weeks prior, audiences were introduced to Charlie Briscoe (Leah Remini) via Living Dolls (1989). Here, Charlie acts like she's never met Michael Learned's character before. Learned was her custodian at the models' home in the previous title.
Leah Remini looks quite a bit different than she did when she became famous. The reason is not exactly because she was younger. Although Leah had already had her nose done, she would later get blepharoplasty as well as a mini-brow lift, and her cheekbones would also benefit from procedural enhancements. Leah has denied all cosmetic surgery claims. "Experts" say she may have had fillers in her late 40's. She only looks younger here.