Out for five weeks with a cold? Is there any more to this story?
I love Orson as a replacement, especially his interaction with Phil: "Orrrrson Welllls" "Hey, Orsie..." Orson is a bit off as a comedian (until he appears in the Jack Returns episode, he'd do much better in his Orson Welles' Almanac program) but there are some great bits in there, especially with Dennis and Phil.
I just wondered if there was some personal problem that I missed in the bio's I've read. Mary also misses one or two of those weeks which adds to the mystery. I know Jack was a hypochondriac but five weeks for a cold seems a little beyond normal.