Question: School for Secrets included a supporting role for which Scottish actor from "Dad's Army"?

Context articles: TVB Anniversary Award for Best Supporting Actor
Rob Roy (1995 film)
Daphne Courtney
John Laurie
Tony Osoba
Annette Crosbie
Ralph Riach
Bob Frazer
School for Secrets
Peter Capaldi

The TVB Anniversary Award for Best Actor in a Supporting Role is one of the TVB Anniversary Awards presented annually by Television Broadcasts Limited (TVB) to recognize an actor who has delivered an outstanding performance in Hong Kong television dramas throughout the designated year.
 This award was not introduced to the awards ceremony until 2003, six years after its establishment.
 The Best Supporting Actor award was first called the My Favourite Powerhouse Actor of the Year (本年度我最喜愛的實力非凡男藝員) in 2003.
 The name was changed to Best Actor in a Supporting Role (最佳男配角) in 2005.
Rob Roy is a 1995 American adventure film directed by Michael Caton-Jones.
 Liam Neeson stars as Rob Roy MacGregor, an 18th-century Scottish clan chief who battles with an unscrupulous nobleman in the Scottish Highlands.
 Jessica Lange, John Hurt, Tim Roth, Eric Stoltz, Brian Cox, and Jason Flemyng also star.
 Roth won the BAFTA Award for Best Actor in a Supporting Role and was nominated for the Academy Award for Best Supporting Actor for his portrayal of the treacherous aristocrat Archibald Cunningham.
Daphne Courtney (born 1917) is a South African actress, who performed in B-movie British "quota quickies" of the 1930s and 1940s.
 She had a supporting role in at least one French film, Le battalion du ciel, directed by Alexander Esway.
 She also had a stage career, and stage credits include the first British performance of "The Man Who Came to Dinner" (17 Nov 1941) – pre-dating its London debut by three weeks – in which she appeared with her husband the Scottish actor Hugh McDermott.
John Paton Laurie (25 March 1897 – 23 June 1980) was a Scottish actor.
 Throughout a long career, Laurie performed a wide range of theatre and film work.
 He is perhaps best remembered to modern audiences for his role as Private Frazer in the sitcom "Dad's Army" (1968–1977).
 Laurie appeared in scores of feature films with directors such as Alfred Hitchcock, Michael Powell, and Laurence Olivier.
 He was also a stage actor (particularly in Shakespearean roles) and speaker of verse, especially of Robert Burns.
Tony Osoba (born 15 March 1947) is a Scottish actor best known for his role as Jim 'Jock' McClaren in the popular 1970s British sitcom "Porridge".
 He also appeared in its sequel "Going Straight".
 Osoba was the first black Scottish actor to appear on primetime television when he appeared in the series.
 Since then, he has appeared twice in Coronation Street, first as Wesley McGregor in 1982, and secondly as Mike Baldwin's boss Peter Ingram for a few episodes in 1990, before the character was killed off.
Annette Crosbie, {'1': ", '2': ", '3': ", '4': "} (born 12 February 1934) is a Scottish actor.
 She is known for her role as Margaret Meldrew in the BBC sitcom "One Foot in the Grave" (1990–2000).
 She twice won the BAFTA TV Award for Best Actress, for "The Six Wives of Henry VIII" in 1971 and "Edward the Seventh" in 1976, and was nominated for the BAFTA Award for Best Actress in a Supporting Role for the 1976 film "The Slipper and the Rose".
 Her other film appearances include "The Pope Must Die" (1991), "Shooting Fish" (1997), "Calendar Girls" (2003) and "Into the Woods" (2014).
Ralph Riach (born 1936) is a Scottish actor from Elgin, Moray.
 He is best known for his role as "John McIver" (better known as "TV John") in BBC One Scotland's comedy/drama "Hamish Macbeth".
 His career began at the age of 45, when he appeared in "Lost Empires" (1986).
 He has appeared in television shows including "Chancer", "Mosley", "Taggart", "Monarch of the Glen", "Peak Practice", "Doctor Finlay", and "Tutti Frutti".
 Film appearances include "The House of Mirth" (2000), "" (1999), "Braveheart" (1995) and "Copying Beethoven" (2006).
 He also portrayed John Laurie in the story of the making of Dad's Army.
Bob Frazer (born 1971) is an award winning actor, born in Ontario.
 He currently lives in British Columbia.
 He has appeared in many roles both on stage and in television, and has won multiple Jessie Richardson Theatre Awards, including: "Outstanding Performance by an Actor in a Leading Role" (2005–2006) for his role in "Hamlet", "Outstanding Performance by an Actor in a Supporting Role" (2005–2006) for his role in "Prodigal Son", and won for "Significant Artistic Achievement" (2003–2004).
 He has also been a nominee over ten times including "Outstanding Performance by an Actor in a Supporting Role" (2003–2004) for "The Glass Menagerie"; Iago in Shakespeare's "Othello"; and as Antipholus of Ephesus in "Comedy of Errors" during the 2009 season of Bard on the Beach.
School for Secrets (also known as Secret Flight) is a 1946 British black and white film written and directed by Peter Ustinov and starring Ralph Richardson.
 In leading supporting roles were David Tomlinson, Raymond Huntley, Finlay Currie, Richard Attenborough, John Laurie and Michael Hordern.
 Developed with the full cooperation of the Air Ministry, the film celebrates the discovery of radar.
Peter Dougan Capaldi (born 14 April 1958) is a Scottish actor, writer and director, best known for playing the twelfth incarnation of the Doctor in "Doctor Who" and as spin doctor Malcolm Tucker in "The Thick of It", for which he has received four British Academy Television Award nominations, winning Best Male Comedy Performance in 2010.
 For reprising the role in the spinoff film "In the Loop", Capaldi was honoured with several film critic award nominations for Best Supporting Actor.
 He further took on the role of Paddington Bear's neighbour Mr. Curry in the family comedy film "Paddington"; he is set to reprise the role in "Paddington 2".