Question: What type of transmission does Silent Witness and Amanda Burton have in common?

Context articles: A Silent Witness
Amanda Burton
The Helen West Casebook
Transstadial transmission
Lindsey Hill
Heather Black
List of Silent Witness episodes
Silent Witness (2017 film)
Emilia Fox
Silent Witness

A Silent Witness is a 1912 Australian silent film directed by Franklyn Barrett.
 It is considered a lost film.
 It was a drama set in Sydney with Cyril Mackay as the hero.
Amanda Burton (born 10 October 1956) is a Northern Irish actress, well known for her television roles, including Heather Black in the Channel 4 soap opera "Brookside", Beth Glover in "Peak Practice", Sam Ryan in the BBC crime drama series "Silent Witness", Clare Blake in "The Commander" and Karen Fisher in "Waterloo Road".
The Helen West Casebook is a British television crime drama, first broadcast in May 2002 on ITV1.
 The series is based upon the novels of Frances Fyfield, a former crown prosecutor, whom the character of Helen West, played in the series by Amanda Burton, is based loosely upon.
 Although only three episodes were broadcast, the series obtained a cult following, and was obtained by Acorn Media for release in the United States in August 2009.
 The complete series was released on DVD in the United Kingdom on 24 May 2010.
Transstadial transmission occurs when a pathogen remains with the vector from one life stage ("stadium") to the next.
 For example, the bacteria "Borrelia burgdorferi", the causative agent for Lyme disease, infects the tick vector as a larva, and the infection is maintained when it molts to a nymph and later develops as an adult.
 This type of transmission is seen in other parasites like viruses or "Rickettsia".
 In addition to ticks, mites are another common vector.
 Some sources consider transstadial transmission a type of horizontal transmission, whereas other sources consider it vertical or partial vertical transmission.
Lindsey began her working life with a ten-year career as a solicitor, specialising in insolvency and fraud related litigation.
 Following the suicide of a man forced into bankruptcy by one of her clients in 1994, Lindsey gave up private practice in order to focus on her writing career.
 Since then she has written for series such as "Follow The Money", "Partner’s In Law", "Silent Witness", "Common Law", "EastEnders" and "Madson II", all for the BBC; "After Thomas", a TV drama about a boy with autism for ITV, "Implicated" for Channel 4, and "Family Affairs" and "Wing & A Prayer II" for FIVE.
Heather Black ("née" Haversham; previously Huntington) was a regular character in UK Channel 4 soap opera, "Brookside", played by Amanda Burton from 1982 until 1986.
"Silent Witness" is a British television drama.
 The following is a list of all episodes that have been broadcast across all television series, since the series began on 21 February 1996.
 The first seven series featured Amanda Burton in the lead role.
 Following Burton's departure (in series 8, episode 2), Emilia Fox joined the show (in series 8, episode 5) as new forensic pathologist Nikki Alexander, and as of 2016 she is still in the series.
 In the first episode of series 6, William Gaminara and Tom Ward both joined the series.
 After series 15, Ward left the show to pursue other projects.
 He was replaced by David Caves and Liz Carr who both joined the show in series 16.
Silent Witness () is an upcoming South Korean crime thriller film starring Choi Min-shik and Park Shin-hye.
 It is a remake of the Chinese film "Silent Witness".
Emilia Rose Elizabeth Fox (born 31 July 1974) is an English actress, known for her role as Dr. Nikki Alexander on BBC crime drama "Silent Witness", having joined the cast in 2004 following the departure of Amanda Burton.
 Fox is now the longest serving cast member since the departures of Tom Ward in 2012 and William Gaminara in 2013.
 She also appeared as Morgause in the BBC’s "Merlin" beginning in the programme's second series.
 She was educated at Bryanston School in Blandford, Dorset.
Silent Witness is a British television crime drama series, produced by the BBC, which focuses on a team of forensic pathology experts and their investigations into various crimes.
 First broadcast in 1996, the series was created by Nigel McCrery, a former murder squad detective based in Nottingham.
 He later went on to create the hit series "New Tricks", with writer Roy Mitchell.
 Since 1996, twenty series of the programme have been broadcast.
 Amanda Burton originally starred as primary character Dr. Sam Ryan, before leaving the show during the eighth series.
 Since, the series has featured more of an ensemble cast, currently consisting of Emilia Fox, David Caves, Liz Carr and Richard Lintern.
 The programme is broadcast in more than 235 territories, including ABC in Australia, Showcase and the Knowledge Network in Canada, KRO in the Netherlands, TV One and Prime in New Zealand, and BBC America in the United States.
 Twenty years after its inception, "Silent Witness" continues to achieve good audience ratings; in 2011 Series 14 attracted an average audience of nine million viewers.