In the opener, Mrs. Cropley offers what appears to be a beautiful chocolate birthday cake for Mr. Pickle. Sadly, it turns out Mrs. Cropley made the cake using Marmite. Marmite is made from yeast extract, a by-product of beer brewing. Marmite is a sticky, dark brown food paste with a distinctive, powerful flavor, which is extremely salty. Other similar products include the Australian Vegemite, the Swiss Cenovis, and the German Vitamin-R.
Its revealed that Frank is now 60 in this episode featuring his Birthday Party.