Question: Which Skin Deep actor also appeared in "Three's Company" and later "Three's a Crowd"?
Context: Skin Deep is a 1989 romantic comedy film written and directed by Blake Edwards, and starring John Ritter. Barbara Summers (September 6, 1944 – November 2014) was an American writer and educator who had also had a long and successful career as a fashion model, working for 17 years with Ford Models, one of America's top agencies.  Her 1998 book, "Skin Deep" – the story of Black models in America and abroad – is a definitive work on black women in the modeling industry.  for which she spent more a decade interviewing fashion professionals on three continents to record their experiences, Temptations Live!  was the first live album to be released by The Temptations.  Recorded on October 3, 1966 in the Upper Deck of the Roostertail Club in Detroit, Michigan, and released on album by Gordy (Motown) Records in 1967, the album features David Ruffin, Paul Williams, Eddie Kendricks, Melvin Franklin, and Otis Williams performing their regular live repertoire for a highly receptive crowd mostly consisting of young women.  Included in the set are Temptations hits such as "My Girl", "My Baby", "Get Ready", "Ain't Too Proud to Beg", "Don't Look Back", and the group's then-current single, "Beauty Is Only Skin Deep".  Out of the several live albums the group recorded during their career, this is the only one to feature David Ruffin.  The album remained on the Billboard 200 album chart for 51 weeks peaking at number 10. "Beauty Is Only Skin Deep" is a 1964 song, that became a 1966 hit single recorded by The Temptations for the Gordy (Motown) label.  Written by Norman Whitfield and Edward Holland, Jr., and produced by Whitfield, the song was a number three pop hit and a number one R&B hit in the United States. <ref name="Top R&B/Hip-Hop Singles"> </ref> Jill Daley (born 1976/77) is a Scottish broadcaster, model and journalist who lost her sight at the age of 19 to a condition called diabetic retinopathy.  She presents "The Daily Lunch", a weekday lunchtime show on Glasgow's Insight Radio, a radio station for visually impaired listeners.  Daley worked as a blind adviser for director Eleanor Yule and producer Oscar van Heek for the film "Blinded".  Yule and van Heek intend to make a film about Daley’s life.  In November 2014, she appeared in an episode of BBC Radio Scotland's "Skin Deep" discussing beauty and body image issues for people with sight loss. Anna Fur Laxis is an English pin-up model and burlesque dancer, particularly noteworthy for her extensive tattoos and her introduction of axe-throwing and other unusual skills into her work.  Her performances include residencies at Jeepers Peepers Burlesque (York, UK) and Wet Spot (Leeds, UK), and have been acclaimed around the world.  She also makes frequent appearances in print both as a model and as a celebrity, having appeared many times in "21st Century Pin-Ups" magazine, "Skin Deep" magazine and "Bizarre" magazine. Jonathan Southworth Ritter (September 17, 1948 – September 11, 2003) was an American actor and comedian.  The son of the late singing cowboy star Tex Ritter and the father of actors Jason Ritter and Tyler Ritter, he was best known for his role as Jack Tripper on the ABC sitcom "Three's Company" (1977–84), for which he received a Primetime Emmy Award and a Golden Globe Award in 1984.  He briefly reprised the role on the spin-off "Three's a Crowd", which aired for one season. Mailon Rivera is a New York City native and actor.  With starring roles in films such as "Midnight Blue" and "Skin Deep" and guest appearances on over 35 top rated television shows, he is also known for his role as Nation of Islam leader, Min.  Xavier Salaam on the Golden Globe and Emmy Award winning drama series "The Shield", and Omar K. Bone in the UPN comedy series "Second Time Around". "4, 5, 6" is the first single released from Solé's debut album, "Skin Deep".  It was produced by Christopher "Tricky" Stewart and featured a guest verse from JT Money and a chorus by Kandi.  This was Solé's second collaboration with JT Money and Stewart, as the three had worked together on JT Money's hit single "Who Dat" the previous year Young and Wild is a compilation by Cherie & Marie Currie.  This album has all 10 original tracks from Messin' with the Boys, six songs from Beauty's Only Skin Deep, three songs Cherie Currie sang with The Runaways, and one new track co-written by Marie Currie, "Longer Than Forever".  "Longer Than Forever" was the B side of the single "Since You Been Gone".
Answer: John Ritter