Instagram/Colton Underwood & Cassie TV Colton Underwood reveals his strict condition for joining The Traitors: his past with Cassie Randolph was off-limits. Read the Vanity Fair interview. March 27, 2026 AceShowbiz - Colton Underwood has opened up about his decision to participate in the reality series The Traitors with a firm boundary: his personal history with ex-girlfriend Cassie Randolph would not be discussed on the show.