Lawrence Patrick (1920 – April 30, 2006) may well be considered one of the fathers of the crash test dummy.
 Between 1960 and 1975, while a biomechanics professor at Detroit's Wayne State University, Patrick described his work by saying "I was a human crash-test dummy", Patrick allowed himself to be subject to rocket sled rides, crushing blows to the head and body, and other forms of physical abuse in an effort to develop a body of data on how the human body responded in a vehicle accident.
 One of his students, Harold Mertz, went on to develop Hybrid III, the current worldwide standard crash test dummy.
 Lawrence also subjected himself to a 50 pound pendulum to the breast plate to test the effects of a steering column on a human.
 Lawrence died of Parkinson's Disease on April 30, 2006 at the age of 85.
Jorma Kalevi Peltonen (January 11, 1944 – April 30, 2010) was a Finnish professional ice hockey player who played in the SM-liiga.
 Born in Messukylä, Finland, he played for Ilves, Jokerit, and Lukko.
 He was inducted into the Finnish Hockey Hall of Fame in 1987 and died on April 30, 2010 in Tampere, Finland.
Dr. V. K. Govindan (born April 30, 1950) is a professor, retired from the Department of Computer Science and Engineering at National Institute of Technology, Calicut.
 He has received bachelor's and master's degrees in electrical engineering from Regional Engineering College Calicut (now NIT Calicut) in the year 1975 and 1978, respectively.
 He has obtained PhD degree from one of the premier institute in India, IISc Bangalore.
 He has more than 35 years of teaching experience at under graduate and post graduate levels.
 He served as Head of the Department of Computer Science and Engineering, NIT Calicut during the years 2000 to 2005.
 He was Dean Academic of NIT Calicut during 2011 to 2014.
The Master Cleanse is a 2016 American horror film written and directed by Bobby Miller.
 The film stars Johnny Galecki, Anna Friel, Oliver Platt, Anjelica Huston, Kyle Gallner, Kevin J. O'Connor and Diana Bang.
Mary Patricia Burke (born April 30, 1959) is an American businesswoman and a member of the Madison, Wisconsin school board since April 30, 2012.
 She was the Democratic candidate for Governor of Wisconsin in the 2014 election.
 Burke is a former executive at Trek Bicycle Corporation; she also served as the Wisconsin Secretary of Commerce from January 2005 to November 2007.
 She is the daughter of Trek Bicycle Corporation founder Richard Burke.
The skirmish known as Cleanse the Causeway, or Clear the Causeway, took place in the High Street of Edinburgh, Scotland, on April 30, 1520, between rivals James Hamilton, 1st Earl of Arran, chief of Clan Hamilton, and Archibald Douglas, 6th Earl of Angus, chief of Clan Douglas.
Jane Castro (born April 30, 1982) is an American musician, recording artist and TV personality who is active in the American and Latin markets.
 Born in Miami, Florida on April 30, 1982 to Cuban immigrants, she is professionally known as Jei and Jane Castro.
William D. Russell (April 30, 1908 - April, 1968) was an American film and television director.
 Born in Indianapolis, Indiana on April 30, 1908, he began his Hollywood career with the 1945 film "Hollywood Victory Caravan".
 His career in film ended with his last film, 1951's "Best of the Badmen".
 In the early fifties he began directing for television with Screen Gems, and his many credits include episodes of "Father Knows Best" (he was with the show from 1954 to 1956), "Dennis the Menace", "Perry Mason", "Hazel", "Bewitched", "the Farmer's Daughter" and "Family Affair".
 Russell was nominated for three Emmys, first for "You Are There" in 1953, second for "the Farmer's Daughter" in 1964, and later for "Family Affair" in 1967.
 His directorial career ended shortly before his death in April 1968.
The first season of "Starsky & Hutch", a 1970s American cop thriller television series, consisted of 23 episodes that aired between April 30, 1975 and April 21, 1976.
 The show was created by William Blinn, produced by Spelling-Goldberg Productions, and broadcast between April 30, 1975, and May 15, 1979, on the ABC network.
 It was distributed by Columbia Pictures Television in the United States and, originally, Metromedia Producers Corporation in Canada and some other parts of the world.
 Sony Pictures Television is now the worldwide distributor for the series.
 The series featured Paul Michael Glaser as Detective David Starsky, David Soul as Detective Kenneth "Hutch" Hutchinson, Bernie Hamilton as Captain Harold Dobey, and Antonio Fargas as confidential informant "Huggy Bear".
John Mark Galecki (born April 30, 1975) is an American actor.
 He is known for playing David Healy in the ABC sitcom "Roseanne" from 1992 to 1997 and Dr. Leonard Hofstadter in the CBS sitcom "The Big Bang Theory" since 2007.
 Galecki also appeared in the films "National Lampoon's Christmas Vacation" (1989), "Prancer" (1989), "Suicide Kings" (1997), "I Know What You Did Last Summer" (1997), "Bookies" (2003), and "In Time" (2011).

Question: Which star of "The Master Cleanse" was born on April 30, 1975?
Answer: Johnny Galecki