Martin is surprised when his parents suddenly arrive for a visit, and Martin's examination of a woman leads to a surprise diagnosis.
While celebrating Katie's christening, Nick receives a visit from an old girlfriend of his to inform him that they will be investigate the criminal activities of the owner of a well known gambling club.
Puzzling homicides point Emma and Steed to a matchmaking service arranging murders as well as marriages.
Frank's dad Neville turns up at Sheila's to see his new grandchildren, twins Nigel and Delia, the latest additions to the Gallagher clan.
Danger and a royal lesson in humility accompany Templar's mission to transport a queen (Dawn Addams) to Switzerland to obtain jewels.