The 63-year-old actor, who is also the husband and producing partner of the main lead, actress Viola Davis, has been signed on for one episode of the Emmy-winning series, reported Deadline.
Tennon is founded JuVee Productions with Davis, of which he is the co-president.
The couple sealed an overall deal with the ABC Studios, where they plan to develop new projects for broadcast, cable, and streaming services through their collaboration.