16 Best Guest Stars In Red Dwarf
1. Mark Williams - Olaf Petersen
Perhaps better known as Arthur Weasley in the Harry Potter franchise, Mark Williams is an actor with a serious resumé.
In Red Dwarf, he plays catering officer Olaf Petersen, who is also Lister’s best friend. Despite a real lack of screen-time, viewers get to know Petersen through the stories Lister would tell about all their japes.
In recent times, he has been the titular character in Father Brown and previously he was Horace in 101 Dalmatians. Williams has an astounding amount of range as would be expected for an actor of his quality and he does a convincing Danish accent. In fact it’s so good that some viewers would have to be persuaded that it is Williams playing that role.