In the Los Angeles area the Jeff Probst show is on KNBC TV and this episode airs at 2pm-3pm Pacific on Wed 12/12/12.You can find stations and time by State on this web site:
http://www.jeffprobst.com/showfinder/index.html
Note: Jeff does not actually say "you are a lock to win a million dollars" the audio ends with "you are a lock".
Jeff Voice Over: "What they need to do to make it to the end"
Jeff interviewing Malcolm
Jeff: "Unless you do something crazy you are a lock"
Malcolm: "Sometimes I do crazy things"
Pretty highly edited clips though. Could just be implying that he had a lock on getting to the end but did something crazy so it's no longer a lock to get to the end.