Fifty-Two, Forty-Five or Work - S5-E13
Continuity mistake: Rob tells Sally, Buddy and Mel "It was rough... Out of work, new house, no furniture, a baby on the way, 1 single dime in the bank!" In several other episodes Rob said they either already had a kid, or they were on their way to the hospital in the cab, on their way to the hospital in the back of a laundry truck, or were already at the hospital. They already had furniture in the other episodes when they brought Richie home from the hospital.
The Man from My Uncle - S5-E27
Continuity mistake: When Rob and Harry are in Richie's room, it's bright and sunny outside. Six seconds later, they are in the living room, and it's pitch black outside.
Continuity mistake: Laura is reading the name of Rob's book "Unimportant Life of Robert F. Petrie" yet in "Fifty-Two, Forty-Five or Work" Rob said his name was "Robert Simpson Petrie"
