Knock Knock Who's There?

Knock Knock Who's There is the 44th episode of the 29th series of Casualty. It was preceded by The Long Haul and will be followed by Forsaking All Others, Part 1.

Synopsis
Tess is surprised by Sam's arrival. She receives another shock when Sam introduces his new son, Charlie, to her. Sam asks Tess to move up north with him, but, unprepared to give up her job and leave her friends behind, she makes a sacrifice which shocks everyone. A security guard and a homeless teenager fall onto some crates, but when one of the two tell Jacob that illegal immigrants are harboured in a metal container, it is a race against time to save the immigrants from suffocation in there. Dylan walks out on his staff after a difficult day at work. Ethan asks Honey out on a date, while Max asks Lofty to be his best man.

Additional cast
Below is a list of the cast in this episode aside from the regular cast.
 * Luke Bailey as Sam Bateman
 * Elliott Jordan as Richard Webb
 * Aaron Jeffcoate as Joss Pearce
 * Noeleen Comiskey as Sarah Webb
 * Lorraine Cheshire as Pam Poole
 * Paul Trussell as Derek Owen