Jack's Star Trek Reviews & Stuff 

Episode:423
"The Host"

Jack's Rating:

Dr. Crusher falls in love with Odan, only to discover that Odan is a symbiote, which is implanted into Riker after his original host dies. Odan continues peace negotiations using Riker as a temporary host.

Features:
Stardate: 44821.3
Air Date: 05/13/91
Director: Marvin Rush