Dirk Gently’s Holistic Detective Agency Digging into the victim’s past, Dirk and Farah (Samuel Barnett, Jade Eshete) unearth their first major clue in the murder of Patrick Spring, while Todd (Elijah Wood) turns to the police, only to realize he may not be safe anywhere. Hannah Marks also stars. 9 p.m. BBC America
The Graham Norton Show Benedict Cumberbatch, Eddie Redmayne and Bryan Cranston are guests and LeAnn Rimes performs. 10 p.m. BBC America
Saturday Night Live Benedict Cumberbatch hosts with musical guest Solange. 11:29 p.m....