and by other companies—would attempt to copy this formula, with varying degrees of success. Although primarily a studio-based program, Prime Time would occasionally go on the road and tape its segments from various outside locations. Examples included Busch Gardens, Trump Plaza, the CN Tower, and Churchill Downs, among others. These segments rarely had much to do with the actual wrestling content of the program, and were played primarily for the comic interaction between Monsoon and Heenan. Heenan and Monsoon co-hosted Prime Time from 1986–1991. Roddy Piper replaced Heenan briefly in the summer of 1989, during the period Heenan "took over" the last half-hour of the Prime Time program for his own talk show; after Heenan returned to the main program, Piper was retained for the remainder of 1989 as a second co-host. Piper's final episode was the Christmas 1989 episode, where he attacked Heenan for dressing like Santa and badmouthing the Christmas season and insulting kids. The Rosati Sisters, a group of overweight sisters who were fans of the WWF, were frequent guests on the show from 1989 to 1990, also serving as assistants to Heenan on his show. At times, guests have appeared on the studio set for cameo appearances or to sub-host for someone. Gene Okerlund was the most frequent guest, sometimes stopping by on the set for no reason other than to antagonize Heenan. Okerlund also was a substitute host for the series whenever Monsoon or Heenan were away; Vince McMahon was also a substitute host when Monsoon fell ill in early 1988. Tony Schiavone also guest hosted an episode of the series along with Sean Mooney, with the explanation being that Monsoon and Heenan were at the Trump Plaza for Wrestlemania V. Also notably, Freddie Blassie made an appearance in late 1989, antagonizing Heenan for owing him money and turning face in the process. For the rest of the episode, he remained as a special guest co-host alongside Piper in Piper's studio. The Red Rooster and The Brooklyn Brawler also appeared as guests in 1989 for the purpose of an angle where Lombardi knocked out Monsoon with a chair and beat up The Rooster, who had just fired Heenan as his manager. Rick Rude also guested in the summer of 1989 mostly to further his feud with Piper. Arnold Skaaland, Hillbilly Jim, Ted DiBiase, Koko B. Ware, Mr. Fuji, Demolition, Lord Alfred Hayes and Harley Race