Falkus
Explorer
No, it was the final episode. Of course, if St. Elsewhere was a fantasy spun by Tommy Westphall's mind, that has interesting implications for a lot of other television shows: http://home.vicnet.net.au/~kwgow/crossovers.html
Wouldn't the more logical conclusion be that Tommy was actually a latent psionic who was telepathically linked to an alternate version of himself in a parallel dimension?