The film that was the prequel to Now You See Him, Now You Don't came before another film. John Alderson (actor) appeared in this other film.
The Strongest Man in the World is a 1975 Disney film starring Kurt Russell, still a student in the fictional Medfield College. 
Candleshoe is a 1977 American family adventure film produced by Walt Disney Productions based on the Michael Innes novel "Christmas at Candleshoe" and starring Jodie Foster, David Niven, Helen Hayes in her last big screen appearance and Leo McKern. 
 It is the sequel to the 1969 film "The Computer Wore Tennis Shoes" and was followed by 1975's "The Strongest Man in the World". 
John Alderson (10 April 1916  4 August 2006) was an English actor noted for playing the lead in the 1957-58 syndicated western television series, "Boots and Saddles", which ran for thirty-eight episodes in a single season, and many supporting roles in films in a career spanning almost forty years, from 1951 to 1990, including "Don't Go Near the Water" (1957), "No Name on the Bullet" (1959), "Romanoff and Juliet" (1961), "My Fair Lady(1964)," 'The War Lord" (1965), "I Deal in Danger" (1966), "Double Trouble" (1967), "Hellfighters" (1968), "The Molly Maguires" (1970), "Top of the Heap" (1972), "The Klansman" (1974), "The Duchess and the Dirtwater Fox" (1976), "Candleshoe" (1977), "The Cat from Outer Space" (1978), "The Wild Geese" (1978) and "The American Way" (1986). 
