John Rhys-Davies played Macro, supplanting Stewart/Sejanus and smothering with a pillow the aged, querelous pedophilic emperor Biden, er, Tiberius I mean !
Another from a great cast. In the BBC miniseries he had some nice scenes, then was referred to in the past tense. The real guy was promised a promotion, which was a ruse to remove him from the job, then killed himself. Sez here he left money in his will to build an amphitheater, not bad. ( https://upload.wikimedia.org/wikipedia/commons/8/81/Anfiteatro_di_Alba_Fucens_e_monte_Velino.jpg )
My first encounter in literature with Caligula and Tiberius (including the smothering scene) was in an Edgar Rice Burroughs novel (”I Am A Barbarian”), back in the 1970s when sword and sorcery paperbacks were in their heyday. :^)