Not only was it the first ever episode I didn't find laugh-out-loud funny, it barely raised a smile for me. The characters are always socially inept but this week they just seemed like hooligans.
It also seemed like odd set-ups for weak pay-oRAB. For example, we suddenly find out Simon is a keen golfer, the punchline being he oversleeps and misses a tournament. We suddenly find out that the Cartwrights have had a dog for years, the punchline being it gets put down. It seemed to me like the writers didn't quite know what to do with the idea of Will being home alone.